diff --git a/src/Components/Components/src/ITempData.cs b/src/Components/Components/src/ITempData.cs
new file mode 100644
index 000000000000..70f637e7af6e
--- /dev/null
+++ b/src/Components/Components/src/ITempData.cs
@@ -0,0 +1,32 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+namespace Microsoft.AspNetCore.Components;
+
+/// <summary>
+/// Provides a dictionary for storing data that is needed for subsequent requests.
+/// Data stored in TempData is automatically removed after it is read unless
+/// <see cref="Keep()"/> or <see cref="Keep(string)"/> is called, or it is accessed via <see cref="Peek(string)"/>.
+/// </summary>
+public interface ITempData : IDictionary<string, object?>
+{
+    /// <summary>
+    /// Gets the value associated with the specified key and then schedules it for deletion.
+    /// </summary>
+    object? Get(string key);
+
+    /// <summary>
+    /// Gets the value associated with the specified key without scheduling it for deletion.
+    /// </summary>
+    object? Peek(string key);
+
+    /// <summary>
+    /// Makes all of the keys currently in TempData persist for another request.
+    /// </summary>
+    void Keep();
+
+    /// <summary>
+    /// Makes the element with the <paramref name="key"/> persist for another request.
+    /// </summary>
+    void Keep(string key);
+}
diff --git a/src/Components/Components/src/PublicAPI.Unshipped.txt b/src/Components/Components/src/PublicAPI.Unshipped.txt
index 908e19bcf6f2..2e3f440a6e8b 100644
--- a/src/Components/Components/src/PublicAPI.Unshipped.txt
+++ b/src/Components/Components/src/PublicAPI.Unshipped.txt
@@ -1,4 +1,23 @@
 #nullable enable
+Microsoft.AspNetCore.Components.ITempData
+Microsoft.AspNetCore.Components.ITempData.Get(string! key) -> object?
+Microsoft.AspNetCore.Components.ITempData.Keep() -> void
+Microsoft.AspNetCore.Components.ITempData.Keep(string! key) -> void
+Microsoft.AspNetCore.Components.ITempData.Peek(string! key) -> object?
+Microsoft.AspNetCore.Components.TempData
+Microsoft.AspNetCore.Components.TempData.ContainsValue(object? value) -> bool
+Microsoft.AspNetCore.Components.TempData.TempData() -> void
+Microsoft.AspNetCore.Components.TempData.Get(string! key) -> object?
+Microsoft.AspNetCore.Components.TempData.this[string! key].get -> object?
+Microsoft.AspNetCore.Components.TempData.this[string! key].set -> void
+Microsoft.AspNetCore.Components.TempData.Keep() -> void
+Microsoft.AspNetCore.Components.TempData.Keep(string! key) -> void
+Microsoft.AspNetCore.Components.TempData.Peek(string! key) -> object?
+Microsoft.AspNetCore.Components.TempData.Clear() -> void
+Microsoft.AspNetCore.Components.TempData.Remove(string! key) -> bool
+Microsoft.AspNetCore.Components.TempData.ContainsKey(string! key) -> bool
+Microsoft.AspNetCore.Components.TempData.Load(System.Collections.Generic.IDictionary<string!, object?>! data) -> void
+Microsoft.AspNetCore.Components.TempData.Save() -> System.Collections.Generic.IDictionary<string!, object?>!
 Microsoft.AspNetCore.Components.IComponentPropertyActivator
 Microsoft.AspNetCore.Components.IComponentPropertyActivator.GetActivator(System.Type! componentType) -> System.Action<System.IServiceProvider!, Microsoft.AspNetCore.Components.IComponent!>!
 *REMOVED*Microsoft.AspNetCore.Components.ResourceAsset.ResourceAsset(string! url, System.Collections.Generic.IReadOnlyList<Microsoft.AspNetCore.Components.ResourceAssetProperty!>? properties) -> void
diff --git a/src/Components/Components/src/TempData.cs b/src/Components/Components/src/TempData.cs
new file mode 100644
index 000000000000..3778e385bf32
--- /dev/null
+++ b/src/Components/Components/src/TempData.cs
@@ -0,0 +1,200 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Collections;
+
+namespace Microsoft.AspNetCore.Components;
+
+/// <inheritdoc/>
+public class TempData : ITempData
+{
+    private readonly Dictionary<string, object?> _data = new(StringComparer.OrdinalIgnoreCase);
+    private readonly HashSet<string> _retainedKeys = new(StringComparer.OrdinalIgnoreCase);
+
+    /// <inheritdoc/>
+    public object? this[string key]
+    {
+        get => Get(key);
+        set
+        {
+            _data[key] = value;
+            _retainedKeys.Add(key);
+        }
+    }
+
+    /// <inheritdoc/>
+    public object? Get(string key)
+    {
+        _retainedKeys.Remove(key);
+        return _data.GetValueOrDefault(key);
+    }
+
+    /// <inheritdoc/>
+    public object? Peek(string key)
+    {
+        return _data.GetValueOrDefault(key);
+    }
+
+    /// <inheritdoc/>
+    public void Keep()
+    {
+        _retainedKeys.Clear();
+        _retainedKeys.UnionWith(_data.Keys);
+    }
+
+    /// <inheritdoc/>
+    public void Keep(string key)
+    {
+        if (_data.ContainsKey(key))
+        {
+            _retainedKeys.Add(key);
+        }
+    }
+
+    /// <inheritdoc/>
+    public bool ContainsKey(string key)
+    {
+        return _data.ContainsKey(key);
+    }
+
+    /// <inheritdoc/>
+    public bool Remove(string key)
+    {
+        _retainedKeys.Remove(key);
+        return _data.Remove(key);
+    }
+
+    /// <summary>
+    /// Returns true if the TempData dictionary contains the specified <paramref name="value"/>.
+    /// </summary>
+    public bool ContainsValue(object? value)
+    {
+        return _data.ContainsValue(value);
+    }
+
+    /// <summary>
+    /// Gets the data that should be saved for the next request.
+    /// </summary>
+    public IDictionary<string, object?> Save()
+    {
+        var dataToSave = new Dictionary<string, object?>();
+        foreach (var key in _retainedKeys)
+        {
+            dataToSave[key] = _data[key];
+        }
+        return dataToSave;
+    }
+
+    /// <summary>
+    /// Loads data from a <paramref name="data"/> into the TempData dictionary.
+    /// </summary>
+    public void Load(IDictionary<string, object?> data)
+    {
+        _data.Clear();
+        _retainedKeys.Clear();
+        foreach (var kvp in data)
+        {
+            _data[kvp.Key] = kvp.Value;
+            _retainedKeys.Add(kvp.Key);
+        }
+    }
+
+    /// <inheritdoc/>
+    public void Clear()
+    {
+        _data.Clear();
+        _retainedKeys.Clear();
+    }
+
+    ICollection<string> IDictionary<string, object?>.Keys => _data.Keys;
+
+    ICollection<object?> IDictionary<string, object?>.Values => _data.Values;
+
+    int ICollection<KeyValuePair<string, object?>>.Count => _data.Count;
+
+    bool ICollection<KeyValuePair<string, object?>>.IsReadOnly => ((ICollection<KeyValuePair<string, object?>>)_data).IsReadOnly;
+
+    void IDictionary<string, object?>.Add(string key, object? value)
+    {
+        this[key] = value;
+    }
+
+    bool IDictionary<string, object?>.TryGetValue(string key, out object? value)
+    {
+        value = Get(key);
+        return ContainsKey(key);
+    }
+
+    void ICollection<KeyValuePair<string, object?>>.Add(KeyValuePair<string, object?> item)
+    {
+        ((IDictionary<string, object?>)this).Add(item.Key, item.Value);
+    }
+
+    bool ICollection<KeyValuePair<string, object?>>.Contains(KeyValuePair<string, object?> item)
+    {
+        return ContainsKey(item.Key) && Equals(Peek(item.Key), item.Value);
+    }
+
+    void ICollection<KeyValuePair<string, object?>>.CopyTo(KeyValuePair<string, object?>[] array, int arrayIndex)
+    {
+        ((ICollection<KeyValuePair<string, object?>>)_data).CopyTo(array, arrayIndex);
+    }
+
+    bool ICollection<KeyValuePair<string, object?>>.Remove(KeyValuePair<string, object?> item)
+    {
+        if (ContainsKey(item.Key) && Equals(Peek(item.Key), item.Value))
+        {
+            return Remove(item.Key);
+        }
+        return false;
+    }
+
+    IEnumerator<KeyValuePair<string, object?>> IEnumerable<KeyValuePair<string, object?>>.GetEnumerator()
+    {
+        return new TempDataEnumerator(this);
+    }
+
+    IEnumerator IEnumerable.GetEnumerator()
+    {
+        return new TempDataEnumerator(this);
+    }
+
+    class TempDataEnumerator : IEnumerator<KeyValuePair<string, object?>>
+    {
+        private readonly TempData _tempData;
+        private readonly IEnumerator<KeyValuePair<string, object?>> _innerEnumerator;
+
+        public TempDataEnumerator(TempData tempData)
+        {
+            _tempData = tempData;
+            _innerEnumerator = tempData._data.GetEnumerator();
+        }
+
+        public KeyValuePair<string, object?> Current
+        {
+            get
+            {
+                var kvp = _innerEnumerator.Current;
+                _tempData.Remove(kvp.Key);
+                return kvp;
+            }
+        }
+
+        object IEnumerator.Current => _innerEnumerator.Current;
+
+        public void Dispose()
+        {
+            _innerEnumerator.Dispose();
+        }
+
+        public bool MoveNext()
+        {
+            return _innerEnumerator.MoveNext();
+        }
+
+        public void Reset()
+        {
+            _innerEnumerator.Reset();
+        }
+    }
+}
diff --git a/src/Components/Components/test/TempDataTest.cs b/src/Components/Components/test/TempDataTest.cs
new file mode 100644
index 000000000000..e02c062ffaad
--- /dev/null
+++ b/src/Components/Components/test/TempDataTest.cs
@@ -0,0 +1,210 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+namespace Microsoft.AspNetCore.Components;
+
+public class TempDataTest
+{
+    [Fact]
+    public void Indexer_CanSetAndGetValues()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+        var value = tempData["Key1"];
+        Assert.Equal("Value1", value);
+    }
+
+    [Fact]
+    public void Get_ReturnsValueAndRemovesFromRetainedKeys()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+
+        var value = tempData.Get("Key1");
+
+        Assert.Equal("Value1", value);
+        var saved = tempData.Save();
+        Assert.Empty(saved);
+    }
+
+    [Fact]
+    public void Get_ReturnsNullForNonExistentKey()
+    {
+        var tempData = new TempData();
+        var value = tempData.Get("NonExistent");
+        Assert.Null(value);
+    }
+
+    [Fact]
+    public void Peek_ReturnsValueWithoutRemovingFromRetainedKeys()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+        var value = tempData.Peek("Key1");
+        Assert.Equal("Value1", value);
+        value = tempData.Get("Key1");
+        Assert.Equal("Value1", value);
+    }
+
+    [Fact]
+    public void Peek_ReturnsNullForNonExistentKey()
+    {
+        var tempData = new TempData();
+        var value = tempData.Peek("NonExistent");
+        Assert.Null(value);
+    }
+
+    [Fact]
+    public void Keep_RetainsAllKeys()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+        tempData["Key2"] = "Value2";
+        _ = tempData.Get("Key1");
+        _ = tempData.Get("Key2");
+
+        tempData.Keep();
+
+        var value1 = tempData.Get("Key1");
+        var value2 = tempData.Get("Key2");
+        Assert.Equal("Value1", value1);
+        Assert.Equal("Value2", value2);
+    }
+
+    [Fact]
+    public void KeepWithKey_RetainsSpecificKey()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+        tempData["Key2"] = "Value2";
+        _ = tempData.Get("Key1");
+        _ = tempData.Get("Key2");
+
+        tempData.Keep("Key1");
+
+        var saved = tempData.Save();
+        Assert.Single(saved);
+        Assert.Equal("Value1", saved["Key1"]);
+    }
+
+    [Fact]
+    public void KeepWithKey_DoesNothingForNonExistentKey()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+        _ = tempData.Get("Key1");
+
+        tempData.Keep("NonExistent");
+
+        var value = tempData.Get("NonExistent");
+        Assert.Null(value);
+    }
+
+    [Fact]
+    public void ContainsKey_ReturnsTrueForExistingKey()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+        var result = tempData.ContainsKey("Key1");
+        Assert.True(result);
+    }
+
+    [Fact]
+    public void ContainsKey_ReturnsFalseForNonExistentKey()
+    {
+        var tempData = new TempData();
+        var result = tempData.ContainsKey("NonExistent");
+        Assert.False(result);
+    }
+
+    [Fact]
+    public void Remove_RemovesKeyAndReturnsTrue()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+
+        var result = tempData.Remove("Key1");
+
+        Assert.True(result);
+        var value = tempData.Get("Key1");
+        Assert.Null(value);
+    }
+
+    [Fact]
+    public void Remove_ReturnsFalseForNonExistentKey()
+    {
+        var tempData = new TempData();
+        var result = tempData.Remove("NonExistent");
+        Assert.False(result);
+    }
+
+    [Fact]
+    public void Save_ReturnsOnlyRetainedKeys()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+        tempData["Key2"] = "Value2";
+        tempData["Key3"] = "Value3";
+        _ = tempData.Get("Key1");
+        _ = tempData.Get("Key2");
+
+        var saved = tempData.Save();
+
+        Assert.Single(saved);
+        Assert.Equal("Value3", saved["Key3"]);
+    }
+
+    [Fact]
+    public void Load_PopulatesDataFromDictionary()
+    {
+        var tempData = new TempData();
+        var dataToLoad = new Dictionary<string, object>
+        {
+            ["Key1"] = "Value1",
+            ["Key2"] = "Value2"
+        };
+
+        tempData.Load(dataToLoad);
+
+        Assert.Equal("Value1", tempData.Get("Key1"));
+        Assert.Equal("Value2", tempData.Get("Key2"));
+    }
+
+    [Fact]
+    public void Load_ClearsExistingDataBeforeLoading()
+    {
+        var tempData = new TempData();
+        tempData["ExistingKey"] = "ExistingValue";
+        var dataToLoad = new Dictionary<string, object>
+        {
+            ["NewKey"] = "NewValue"
+        };
+
+        tempData.Load(dataToLoad);
+
+        Assert.False(tempData.ContainsKey("ExistingKey"));
+        Assert.True(tempData.ContainsKey("NewKey"));
+    }
+
+    [Fact]
+    public void Clear_RemovesAllData()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+        tempData["Key2"] = "Value2";
+
+        tempData.Clear();
+
+        Assert.Null(tempData.Get("Key1"));
+        Assert.Null(tempData.Get("Key2"));
+    }
+
+    [Fact]
+    public void Indexer_IsCaseInsensitive()
+    {
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+        var value = tempData["KEY1"];
+        Assert.Equal("Value1", value);
+    }
+}
diff --git a/src/Components/Endpoints/src/DependencyInjection/RazorComponentsServiceCollectionExtensions.cs b/src/Components/Endpoints/src/DependencyInjection/RazorComponentsServiceCollectionExtensions.cs
index dc365194fcbe..4e3a0bd2a49f 100644
--- a/src/Components/Endpoints/src/DependencyInjection/RazorComponentsServiceCollectionExtensions.cs
+++ b/src/Components/Endpoints/src/DependencyInjection/RazorComponentsServiceCollectionExtensions.cs
@@ -74,6 +74,26 @@ public static IRazorComponentsBuilder AddRazorComponents(this IServiceCollection
         services.TryAddCascadingValue(sp => sp.GetRequiredService<EndpointHtmlRenderer>().HttpContext);
         services.TryAddScoped<WebAssemblySettingsEmitter>();
         services.TryAddScoped<ResourcePreloadService>();
+        services.TryAddCascadingValue(sp =>
+        {
+            var httpContext = sp.GetRequiredService<EndpointHtmlRenderer>().HttpContext;
+            if (httpContext is null)
+            {
+                return null!;
+            }
+            var key = typeof(ITempData);
+            if (!httpContext.Items.TryGetValue(key, out var tempData))
+            {
+                var tempDataInstance = TempDataService.Load(httpContext);
+                httpContext.Items[key] = tempDataInstance;
+                httpContext.Response.OnStarting(() =>
+                {
+                    TempDataService.Save(httpContext, tempDataInstance);
+                    return Task.CompletedTask;
+                });
+            }
+            return (ITempData)httpContext.Items[key]!;
+        });
 
         services.TryAddScoped<ResourceCollectionProvider>();
         RegisterPersistentComponentStateServiceCollectionExtensions.AddPersistentServiceRegistration<ResourceCollectionProvider>(services, RenderMode.InteractiveWebAssembly);
diff --git a/src/Components/Endpoints/src/DependencyInjection/TempDataService.cs b/src/Components/Endpoints/src/DependencyInjection/TempDataService.cs
new file mode 100644
index 000000000000..2800d45a224f
--- /dev/null
+++ b/src/Components/Endpoints/src/DependencyInjection/TempDataService.cs
@@ -0,0 +1,211 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Text.Json;
+using Microsoft.AspNetCore.DataProtection;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.WebUtilities;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+
+namespace Microsoft.AspNetCore.Components.Endpoints;
+
+internal sealed partial class TempDataService
+{
+    private const string CookieName = ".AspNetCore.Components.TempData";
+    private const string PurposeString = "Microsoft.AspNetCore.Components.Endpoints.TempDataService";
+    private const int MaxEncodedLength = 4050;
+
+    private static IDataProtector GetDataProtector(HttpContext httpContext)
+    {
+        var dataProtectionProvider = httpContext.RequestServices.GetRequiredService<IDataProtectionProvider>();
+        return dataProtectionProvider.CreateProtector(PurposeString);
+    }
+
+    public static TempData Load(HttpContext httpContext)
+    {
+        try
+        {
+            var returnTempData = new TempData();
+            var serializedDataFromCookie = httpContext.Request.Cookies[CookieName];
+            if (serializedDataFromCookie is null)
+            {
+                return returnTempData;
+            }
+
+            var protectedBytes = WebEncoders.Base64UrlDecode(serializedDataFromCookie);
+            var unprotectedBytes = GetDataProtector(httpContext).Unprotect(protectedBytes);
+
+            var dataFromCookie = JsonSerializer.Deserialize<Dictionary<string, JsonElement>>(unprotectedBytes);
+
+            if (dataFromCookie is null)
+            {
+                return returnTempData;
+            }
+
+            var convertedData = new Dictionary<string, object?>();
+            foreach (var kvp in dataFromCookie)
+            {
+                convertedData[kvp.Key] = ConvertJsonElement(kvp.Value);
+            }
+
+            returnTempData.Load(convertedData);
+            return returnTempData;
+        }
+        catch (Exception ex)
+        {
+            // If any error occurs during loading (e.g. data protection key changed, malformed cookie),
+            // return an empty TempData dictionary.
+            if (httpContext.RequestServices.GetService<ILogger<TempDataService>>() is { } logger)
+            {
+                Log.TempDataCookieLoadFailure(logger, CookieName, ex);
+            }
+
+            httpContext.Response.Cookies.Delete(CookieName, new CookieOptions
+            {
+                Path = httpContext.Request.PathBase.HasValue ? httpContext.Request.PathBase.Value : "/",
+            });
+            return new TempData();
+        }
+    }
+
+    public static void Save(HttpContext httpContext, TempData tempData)
+    {
+        var dataToSave = tempData.Save();
+        foreach (var kvp in dataToSave)
+        {
+            if (!CanSerializeType(kvp.Value?.GetType() ?? typeof(object)))
+            {
+                throw new InvalidOperationException($"TempData cannot store values of type '{kvp.Value?.GetType()}'.");
+            }
+        }
+
+        if (dataToSave.Count == 0)
+        {
+            httpContext.Response.Cookies.Delete(CookieName, new CookieOptions
+            {
+                Path = httpContext.Request.PathBase.HasValue ? httpContext.Request.PathBase.Value : "/",
+            });
+            return;
+        }
+
+        var bytes = JsonSerializer.SerializeToUtf8Bytes(dataToSave);
+        var protectedBytes = GetDataProtector(httpContext).Protect(bytes);
+        var encodedValue = WebEncoders.Base64UrlEncode(protectedBytes);
+
+        if (encodedValue.Length > MaxEncodedLength)
+        {
+            if (httpContext.RequestServices.GetService<ILogger<TempDataService>>() is { } logger)
+            {
+                Log.TempDataCookieSaveFailure(logger, CookieName);
+            }
+
+            httpContext.Response.Cookies.Delete(CookieName, new CookieOptions
+            {
+                Path = httpContext.Request.PathBase.HasValue ? httpContext.Request.PathBase.Value : "/",
+            });
+            return;
+        }
+
+        httpContext.Response.Cookies.Append(CookieName, encodedValue, new CookieOptions
+        {
+            HttpOnly = true,
+            IsEssential = true,
+            SameSite = SameSiteMode.Lax,
+            Secure = httpContext.Request.IsHttps,
+            Path = httpContext.Request.PathBase.HasValue ? httpContext.Request.PathBase.Value : "/",
+        });
+    }
+
+    private static object? ConvertJsonElement(JsonElement element)
+    {
+        switch (element.ValueKind)
+        {
+            case JsonValueKind.String:
+                if (element.TryGetGuid(out var guid))
+                {
+                    return guid;
+                }
+                if (element.TryGetDateTime(out var dateTime))
+                {
+                    return dateTime;
+                }
+                return element.GetString();
+            case JsonValueKind.Number:
+                return element.GetInt32();
+            case JsonValueKind.True:
+            case JsonValueKind.False:
+                return element.GetBoolean();
+            case JsonValueKind.Null:
+                return null;
+            case JsonValueKind.Array:
+                return DeserializeArray(element);
+            case JsonValueKind.Object:
+                return DeserializeDictionaryEntry(element);
+            default:
+                throw new InvalidOperationException($"TempData cannot deserialize value of type '{element.ValueKind}'.");
+        }
+    }
+
+    private static object? DeserializeArray(JsonElement arrayElement)
+    {
+        var arrayLength = arrayElement.GetArrayLength();
+        if (arrayLength == 0)
+        {
+            return null;
+        }
+        if (arrayElement[0].ValueKind == JsonValueKind.String)
+        {
+            var array = new List<string?>(arrayLength);
+            foreach (var item in arrayElement.EnumerateArray())
+            {
+                array.Add(item.GetString());
+            }
+            return array.ToArray();
+        }
+        else if (arrayElement[0].ValueKind == JsonValueKind.Number)
+        {
+            var array = new List<int>(arrayLength);
+            foreach (var item in arrayElement.EnumerateArray())
+            {
+                array.Add(item.GetInt32());
+            }
+            return array.ToArray();
+        }
+        throw new InvalidOperationException($"TempData cannot deserialize array of type '{arrayElement[0].ValueKind}'.");
+    }
+
+    private static Dictionary<string, string?> DeserializeDictionaryEntry(JsonElement objectElement)
+    {
+        var dictionary = new Dictionary<string, string?>(StringComparer.Ordinal);
+        foreach (var item in objectElement.EnumerateObject())
+        {
+            dictionary[item.Name] = item.Value.GetString();
+        }
+        return dictionary;
+    }
+
+    private static bool CanSerializeType(Type type)
+    {
+        type = Nullable.GetUnderlyingType(type) ?? type;
+        return
+            type.IsEnum ||
+            type == typeof(int) ||
+            type == typeof(string) ||
+            type == typeof(bool) ||
+            type == typeof(DateTime) ||
+            type == typeof(Guid) ||
+            typeof(ICollection<int>).IsAssignableFrom(type) ||
+            typeof(ICollection<string>).IsAssignableFrom(type) ||
+            typeof(IDictionary<string, string>).IsAssignableFrom(type);
+    }
+
+    private static partial class Log
+    {
+        [LoggerMessage(3, LogLevel.Warning, "The temp data cookie {CookieName} could not be loaded.", EventName = "TempDataCookieLoadFailure")]
+        public static partial void TempDataCookieLoadFailure(ILogger logger, string cookieName, Exception exception);
+
+        [LoggerMessage(3, LogLevel.Warning, "The temp data cookie {CookieName} could not be saved, because it is too large to fit in a single cookie.", EventName = "TempDataCookieSaveFailure")]
+        public static partial void TempDataCookieSaveFailure(ILogger logger, string cookieName);
+    }
+}
diff --git a/src/Components/Endpoints/test/TempDataServiceTest.cs b/src/Components/Endpoints/test/TempDataServiceTest.cs
new file mode 100644
index 000000000000..8b49658d8f3f
--- /dev/null
+++ b/src/Components/Endpoints/test/TempDataServiceTest.cs
@@ -0,0 +1,297 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Microsoft.AspNetCore.Components;
+using Microsoft.AspNetCore.Components.Endpoints;
+using Microsoft.AspNetCore.DataProtection;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Http.Features;
+
+namespace Microsoft.Extensions.DependencyInjection;
+
+public class TempDataServiceTest
+{
+    [Fact]
+    public void Load_ReturnsEmptyTempData_WhenNoCookieExists()
+    {
+        var httpContext = CreateHttpContext();
+
+        var tempData = TempDataService.Load(httpContext);
+
+        Assert.NotNull(tempData);
+        Assert.Empty(tempData.Save());
+    }
+
+    [Fact]
+    public void Save_DeletesCookie_WhenNoDataToSave()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+
+        TempDataService.Save(httpContext, tempData);
+
+        var cookieFeature = httpContext.Features.Get<TestResponseCookiesFeature>();
+        Assert.NotNull(cookieFeature);
+        Assert.Contains(".AspNetCore.Components.TempData", cookieFeature.DeletedCookies);
+    }
+
+    [Fact]
+    public void Save_SetsCookie_WhenDataExists()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+
+        TempDataService.Save(httpContext, tempData);
+
+        var cookieFeature = httpContext.Features.Get<TestResponseCookiesFeature>();
+        Assert.NotNull(cookieFeature);
+        Assert.True(cookieFeature.SetCookies.ContainsKey(".AspNetCore.Components.TempData"));
+    }
+
+    [Fact]
+    public void RoundTrip_PreservesStringValue()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        tempData["StringKey"] = "StringValue";
+
+        TempDataService.Save(httpContext, tempData);
+        SimulateCookieRoundTrip(httpContext);
+        var loadedTempData = TempDataService.Load(httpContext);
+
+        Assert.Equal("StringValue", loadedTempData.Peek("StringKey"));
+    }
+
+    [Fact]
+    public void RoundTrip_PreservesIntValue()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        tempData["IntKey"] = 42;
+
+        TempDataService.Save(httpContext, tempData);
+        SimulateCookieRoundTrip(httpContext);
+        var loadedTempData = TempDataService.Load(httpContext);
+
+        Assert.Equal(42, loadedTempData.Peek("IntKey"));
+    }
+
+    [Fact]
+    public void RoundTrip_PreservesBoolValue()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        tempData["BoolKey"] = true;
+
+        TempDataService.Save(httpContext, tempData);
+        SimulateCookieRoundTrip(httpContext);
+        var loadedTempData = TempDataService.Load(httpContext);
+
+        Assert.Equal(true, loadedTempData.Peek("BoolKey"));
+    }
+
+    [Fact]
+    public void RoundTrip_PreservesGuidValue()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        var guid = Guid.NewGuid();
+        tempData["GuidKey"] = guid;
+
+        TempDataService.Save(httpContext, tempData);
+        SimulateCookieRoundTrip(httpContext);
+        var loadedTempData = TempDataService.Load(httpContext);
+
+        Assert.Equal(guid, loadedTempData.Peek("GuidKey"));
+    }
+
+    [Fact]
+    public void RoundTrip_PreservesDateTimeValue()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        var dateTime = new DateTime(2025, 12, 15, 10, 30, 0, DateTimeKind.Utc);
+        tempData["DateTimeKey"] = dateTime;
+
+        TempDataService.Save(httpContext, tempData);
+        SimulateCookieRoundTrip(httpContext);
+        var loadedTempData = TempDataService.Load(httpContext);
+
+        Assert.Equal(dateTime, loadedTempData.Peek("DateTimeKey"));
+    }
+
+    [Fact]
+    public void RoundTrip_PreservesStringArray()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        var array = new[] { "one", "two", "three" };
+        tempData["ArrayKey"] = array;
+
+        TempDataService.Save(httpContext, tempData);
+        SimulateCookieRoundTrip(httpContext);
+        var loadedTempData = TempDataService.Load(httpContext);
+
+        Assert.Equal(array, loadedTempData.Peek("ArrayKey"));
+    }
+
+    [Fact]
+    public void RoundTrip_PreservesIntArray()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        var array = new[] { 1, 2, 3 };
+        tempData["ArrayKey"] = array;
+
+        TempDataService.Save(httpContext, tempData);
+        SimulateCookieRoundTrip(httpContext);
+        var loadedTempData = TempDataService.Load(httpContext);
+
+        Assert.Equal(array, loadedTempData.Peek("ArrayKey"));
+    }
+
+    [Fact]
+    public void RoundTrip_PreservesDictionary()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        var dict = new Dictionary<string, string> { ["a"] = "1", ["b"] = "2" };
+        tempData["DictKey"] = dict;
+
+        TempDataService.Save(httpContext, tempData);
+        SimulateCookieRoundTrip(httpContext);
+        var loadedTempData = TempDataService.Load(httpContext);
+
+        var loadedDict = Assert.IsType<Dictionary<string, string>>(loadedTempData.Peek("DictKey"));
+        Assert.Equal("1", loadedDict["a"]);
+        Assert.Equal("2", loadedDict["b"]);
+    }
+
+    [Fact]
+    public void RoundTrip_PreservesMultipleDifferentValues()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        tempData["Key1"] = "Value1";
+        tempData["Key2"] = 123;
+        tempData["Key3"] = true;
+
+        TempDataService.Save(httpContext, tempData);
+        SimulateCookieRoundTrip(httpContext);
+        var loadedTempData = TempDataService.Load(httpContext);
+
+        Assert.Equal("Value1", loadedTempData.Peek("Key1"));
+        Assert.Equal(123, loadedTempData.Peek("Key2"));
+        Assert.Equal(true, loadedTempData.Peek("Key3"));
+    }
+
+    [Fact]
+    public void Save_ThrowsForUnsupportedType()
+    {
+        var httpContext = CreateHttpContext();
+        var tempData = new TempData();
+        tempData["Key"] = new object();
+
+        Assert.Throws<InvalidOperationException>(() => TempDataService.Save(httpContext, tempData));
+    }
+
+    [Fact]
+    public void Load_ReturnsEmptyTempData_ForInvalidBase64Cookie()
+    {
+        var httpContext = CreateHttpContext();
+        httpContext.Request.Headers["Cookie"] = ".AspNetCore.Components.TempData=not-valid-base64!!!";
+
+        var tempData = TempDataService.Load(httpContext);
+
+        Assert.NotNull(tempData);
+        Assert.Empty(tempData.Save());
+    }
+
+    [Fact]
+    public void Load_ReturnsEmptyTempData_ForUnsupportedType()
+    {
+        var httpContext = CreateHttpContext();
+        var json = "{\"Key\":[true, false, true]}";
+        var encoded = Microsoft.AspNetCore.WebUtilities.WebEncoders.Base64UrlEncode(System.Text.Encoding.UTF8.GetBytes(json));
+        httpContext.Request.Headers["Cookie"] = $".AspNetCore.Components.TempData={encoded}";
+
+        var tempData = TempDataService.Load(httpContext);
+
+        Assert.NotNull(tempData);
+        Assert.Empty(tempData.Save());
+    }
+
+    private static DefaultHttpContext CreateHttpContext()
+    {
+        var services = new ServiceCollection()
+            .AddSingleton<IDataProtectionProvider, PassThroughDataProtectionProvider>()
+            .BuildServiceProvider();
+
+        var httpContext = new DefaultHttpContext
+        {
+            RequestServices = services
+        };
+        httpContext.Request.Scheme = "https";
+        httpContext.Request.Host = new HostString("localhost");
+
+        var cookieFeature = new TestResponseCookiesFeature();
+        httpContext.Features.Set(cookieFeature);
+        httpContext.Features.Set<IResponseCookiesFeature>(cookieFeature);
+
+        return httpContext;
+    }
+
+    private static void SimulateCookieRoundTrip(HttpContext httpContext)
+    {
+        var cookieFeature = httpContext.Features.Get<TestResponseCookiesFeature>();
+        if (cookieFeature != null && cookieFeature.SetCookies.TryGetValue(".AspNetCore.Components.TempData", out var cookieValue))
+        {
+            httpContext.Request.Headers["Cookie"] = $".AspNetCore.Components.TempData={cookieValue}";
+        }
+    }
+
+    private class PassThroughDataProtectionProvider : IDataProtectionProvider
+    {
+        public IDataProtector CreateProtector(string purpose) => new PassThroughDataProtector();
+
+        private class PassThroughDataProtector : IDataProtector
+        {
+            public IDataProtector CreateProtector(string purpose) => this;
+            public byte[] Protect(byte[] plaintext) => plaintext;
+            public byte[] Unprotect(byte[] protectedData) => protectedData;
+        }
+    }
+
+    private class TestResponseCookiesFeature : IResponseCookiesFeature
+    {
+        public Dictionary<string, string> SetCookies { get; } = new();
+        public HashSet<string> DeletedCookies { get; } = new();
+
+        public IResponseCookies Cookies => new TestResponseCookies(this);
+
+        private class TestResponseCookies : IResponseCookies
+        {
+            private readonly TestResponseCookiesFeature _feature;
+
+            public TestResponseCookies(TestResponseCookiesFeature feature)
+            {
+                _feature = feature;
+            }
+
+            public void Append(string key, string value) => Append(key, value, new CookieOptions());
+
+            public void Append(string key, string value, CookieOptions options)
+            {
+                _feature.SetCookies[key] = value;
+            }
+
+            public void Delete(string key) => Delete(key, new CookieOptions());
+
+            public void Delete(string key, CookieOptions options)
+            {
+                _feature.DeletedCookies.Add(key);
+            }
+        }
+    }
+}
diff --git a/src/Components/test/E2ETest/Tests/TempDataTest.cs b/src/Components/test/E2ETest/Tests/TempDataTest.cs
new file mode 100644
index 000000000000..75ed38cdda2c
--- /dev/null
+++ b/src/Components/test/E2ETest/Tests/TempDataTest.cs
@@ -0,0 +1,126 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Microsoft.AspNetCore.Components.E2ETest.Infrastructure;
+using Microsoft.AspNetCore.Components.E2ETest.Infrastructure.ServerFixtures;
+using Components.TestServer.RazorComponents;
+using Microsoft.AspNetCore.E2ETesting;
+using Xunit.Abstractions;
+using OpenQA.Selenium;
+using TestServer;
+
+namespace Microsoft.AspNetCore.Components.E2ETest.Tests;
+
+public class TempDataTest : ServerTestBase<BasicTestAppServerSiteFixture<RazorComponentEndpointsNoInteractivityStartup<App>>>
+{
+    private const string TempDataCookieName = ".AspNetCore.Components.TempData";
+
+    public TempDataTest(
+        BrowserFixture browserFixture,
+        BasicTestAppServerSiteFixture<RazorComponentEndpointsNoInteractivityStartup<App>> serverFixture,
+        ITestOutputHelper output)
+        : base(browserFixture, serverFixture, output)
+    {
+    }
+
+    public override Task InitializeAsync() => InitializeAsync(BrowserFixture.StreamingContext);
+
+    protected override void InitializeAsyncCore()
+    {
+        base.InitializeAsyncCore();
+        Browser.Manage().Cookies.DeleteCookieNamed(TempDataCookieName);
+    }
+
+    [Fact]
+    public void TempDataCanPersistThroughNavigation()
+    {
+        Navigate($"{ServerPathBase}/tempdata");
+
+        Browser.Equal("No message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.FindElement(By.Id("set-values-button")).Click();
+        Browser.Equal("Message", () => Browser.FindElement(By.Id("message")).Text);
+    }
+
+    [Fact]
+    public void TempDataCanPersistThroughDifferentPages()
+    {
+        Navigate($"{ServerPathBase}/tempdata");
+
+        Browser.Equal("No message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.FindElement(By.Id("set-values-button-diff-page")).Click();
+        Browser.Equal("Message", () => Browser.FindElement(By.Id("message")).Text);
+    }
+
+    [Fact]
+    public void TempDataPeekDoesntDelete()
+    {
+        Navigate($"{ServerPathBase}/tempdata");
+
+        Browser.Equal("No message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.FindElement(By.Id("set-values-button")).Click();
+        Browser.Equal("Message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.FindElement(By.Id("redirect-button")).Click();
+        Browser.Equal("No message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.Equal("Peeked value", () => Browser.FindElement(By.Id("peeked-value")).Text);
+    }
+
+    [Fact]
+    public void TempDataKeepAllElements()
+    {
+        Navigate($"{ServerPathBase}/tempdata?ValueToKeep=all");
+
+        Browser.Equal("No message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.FindElement(By.Id("set-values-button")).Click();
+        Browser.Equal("Kept value", () => Browser.FindElement(By.Id("kept-value")).Text);
+        Browser.Equal("Message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.FindElement(By.Id("redirect-button")).Click();
+        Browser.Equal("Kept value", () => Browser.FindElement(By.Id("kept-value")).Text);
+        Browser.Equal("Message", () => Browser.FindElement(By.Id("message")).Text);
+    }
+
+    [Fact]
+    public void TempDataKeepOneElement()
+    {
+        Navigate($"{ServerPathBase}/tempdata?ValueToKeep=KeptValue");
+
+        Browser.Equal("No message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.FindElement(By.Id("set-values-button")).Click();
+        Browser.Equal("Kept value", () => Browser.FindElement(By.Id("kept-value")).Text);
+        Browser.Equal("Message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.FindElement(By.Id("redirect-button")).Click();
+        Browser.Equal("No message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.Equal("Kept value", () => Browser.FindElement(By.Id("kept-value")).Text);
+    }
+
+    [Fact]
+    public void CanRemoveTheElementWithRemove()
+    {
+        Navigate($"{ServerPathBase}/tempdata");
+
+        Browser.Equal("No peeked value", () => Browser.FindElement(By.Id("peeked-value")).Text);
+        Browser.FindElement(By.Id("set-values-button")).Click();
+        Browser.Equal("Peeked value", () => Browser.FindElement(By.Id("peeked-value")).Text);
+        Browser.Equal("Message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.FindElement(By.Id("redirect-button")).Click();
+        Browser.Equal("No message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.Equal("Peeked value", () => Browser.FindElement(By.Id("peeked-value")).Text);
+        Browser.FindElement(By.Id("delete-button")).Click();
+        Browser.Equal("No message", () => Browser.FindElement(By.Id("message")).Text);
+        Browser.Equal("No peeked value", () => Browser.FindElement(By.Id("peeked-value")).Text);
+    }
+
+    [Fact]
+    public void CanCheckIfTempDataContainsKey()
+    {
+        Navigate($"{ServerPathBase}/tempdata");
+
+        Browser.Equal("False", () => Browser.FindElement(By.Id("contains-peeked-value")).Text);
+        Browser.Equal("False", () => Browser.FindElement(By.Id("contains-message")).Text);
+        Browser.FindElement(By.Id("set-values-button")).Click();
+        Browser.Equal("True", () => Browser.FindElement(By.Id("contains-peeked-value")).Text);
+        Browser.Equal("True", () => Browser.FindElement(By.Id("contains-message")).Text);
+        Browser.FindElement(By.Id("redirect-button")).Click();
+        Browser.Equal("True", () => Browser.FindElement(By.Id("contains-peeked-value")).Text);
+        Browser.Equal("False", () => Browser.FindElement(By.Id("contains-message")).Text);
+    }
+}
diff --git a/src/Components/test/testassets/Components.TestServer/Program.cs b/src/Components/test/testassets/Components.TestServer/Program.cs
index 2f06b00b72ac..f42fbdc26f2e 100644
--- a/src/Components/test/testassets/Components.TestServer/Program.cs
+++ b/src/Components/test/testassets/Components.TestServer/Program.cs
@@ -38,6 +38,7 @@ public static async Task Main(string[] args)
             ["Hot Reload"] = (BuildWebHost<HotReloadStartup>(CreateAdditionalArgs(args)), "/subdir"),
             ["Dev server client-side blazor"] = CreateDevServerHost(CreateAdditionalArgs(args)),
             ["Global Interactivity"] = (BuildWebHost<RazorComponentEndpointsStartup<GlobalInteractivityApp>>(CreateAdditionalArgs(args)), "/subdir"),
+            ["SSR (No Interactivity)"] = (BuildWebHost<RazorComponentEndpointsNoInteractivityStartup<App>>(CreateAdditionalArgs(args)), "/subdir"),
         };
 
         var mainHost = BuildWebHost(args);
diff --git a/src/Components/test/testassets/Components.TestServer/RazorComponents/Pages/TempData/TempDataComponent.razor b/src/Components/test/testassets/Components.TestServer/RazorComponents/Pages/TempData/TempDataComponent.razor
new file mode 100644
index 000000000000..ed4ce0680f49
--- /dev/null
+++ b/src/Components/test/testassets/Components.TestServer/RazorComponents/Pages/TempData/TempDataComponent.razor
@@ -0,0 +1,101 @@
+@page "/tempdata"
+@using Microsoft.AspNetCore.Components.Forms
+@inject NavigationManager NavigationManager
+
+<h1>TempData Basic Test</h1>
+
+<form method="post" @formname="SetTempData" @onsubmit="() => SetValues()">
+    <AntiforgeryToken />
+    <button type="submit" id="set-values-button">Set TempData Values</button>
+</form>
+
+<form method="post" @formname="SetTempDataDiffPage" @onsubmit="() => SetValues(differentPage: true)">
+    <AntiforgeryToken />
+    <button type="submit" id="set-values-button-diff-page">Set TempData Values and Redirect to Different Page</button>
+</form>
+
+<form method="post" @formname="JustRedirect" @onsubmit="() => NavigateToSamePage()">
+    <AntiforgeryToken />
+    <button type="submit" id="redirect-button">Navigate to the Same Page</button>
+</form>
+
+<form method="post" @formname="DeletePeekedValue" @onsubmit="() => DeletePeekedValue()">
+    <AntiforgeryToken />
+    <button type="submit" id="delete-button">Delete peeked value</button>
+</form>
+
+<hr />
+
+<p id="message">@_message</p>
+<p id="peeked-value">@_peekedValue</p>
+<p id="kept-value">@_keptValue</p>
+
+<p id="contains-message">@_containsMessageKey</p>
+<p id="contains-peeked-value">@_containsPeekedValueKey</p>
+
+@code {
+    [SupplyParameterFromForm(Name = "_handler")]
+    public string? Handler { get; set; }
+
+    [CascadingParameter]
+    public ITempData? TempData { get; set; }
+
+    [SupplyParameterFromQuery]
+    public string ValueToKeep { get; set; } = string.Empty;
+
+    [SupplyParameterFromQuery]
+    public string ContainsKey { get; set; } = string.Empty;
+
+    private string? _message;
+    private string? _peekedValue;
+    private string? _keptValue;
+
+    private bool _containsMessageKey;
+    private bool _containsPeekedValueKey;
+
+    protected override void OnInitialized()
+    {
+        _containsMessageKey = TempData?.ContainsKey("Message") ?? false;
+        _containsPeekedValueKey = TempData?.ContainsKey("PeekedValue") ?? false;
+
+        if (Handler is not null)
+        {
+            return;
+        }
+        _message = TempData!.Get("Message") as string ?? "No message";
+        _peekedValue = TempData!.Peek("PeekedValue") as string ?? "No peeked value";
+        _keptValue = TempData!.Get("KeptValue") as string ?? "No kept value";
+
+        if (ValueToKeep == "all")
+        {
+            TempData!.Keep();
+        }
+        else if (!string.IsNullOrEmpty(ValueToKeep))
+        {
+            TempData!.Keep(ValueToKeep);
+        }
+    }
+
+    private void SetValues(bool differentPage = false)
+    {
+        TempData!["Message"] = "Message";
+        TempData!["PeekedValue"] = "Peeked value";
+        TempData!["KeptValue"] = "Kept value";
+        if (differentPage)
+        {
+            NavigateToDifferentPage();
+            return;
+        }
+        NavigateToSamePageKeep(ValueToKeep);
+    }
+
+    private void DeletePeekedValue()
+    {
+        TempData!.Remove("PeekedValue");
+        NavigateToSamePage();
+    }
+
+    private void NavigateToSamePage() => NavigationManager.NavigateTo("/subdir/tempdata", forceLoad: true);
+    private void NavigateToSamePageKeep(string valueToKeep) => NavigationManager.NavigateTo($"/subdir/tempdata?ValueToKeep={valueToKeep}", forceLoad: true);
+    private void NavigateToDifferentPage() => NavigationManager.NavigateTo("/subdir/tempdata/read", forceLoad: true);
+}
diff --git a/src/Components/test/testassets/Components.TestServer/RazorComponents/Pages/TempData/TempDataReadComponent.razor b/src/Components/test/testassets/Components.TestServer/RazorComponents/Pages/TempData/TempDataReadComponent.razor
new file mode 100644
index 000000000000..950e58e1c24b
--- /dev/null
+++ b/src/Components/test/testassets/Components.TestServer/RazorComponents/Pages/TempData/TempDataReadComponent.razor
@@ -0,0 +1,33 @@
+@page "/tempdata/read"
+@using Microsoft.AspNetCore.Components.Forms
+@inject NavigationManager NavigationManager
+
+<h1>TempData Read Test</h1>
+
+<p id="message">@_message</p>
+<p id="peeked-value">@_peekedValue</p>
+<p id="kept-value">@_keptValue</p>
+
+
+@code {
+    [CascadingParameter]
+    public ITempData? TempData { get; set; }
+
+    private string? _message;
+    private string? _peekedValue;
+    private string? _keptValue;
+
+    protected override void OnInitialized()
+    {
+        if (TempData is null)
+        {
+            return;
+        }
+        _message = TempData.Get("Message") as string;
+        _message ??= "No message";
+        _peekedValue = TempData.Get("PeekedValue") as string;
+        _peekedValue ??= "No peeked value";
+        _keptValue = TempData.Get("KeptValue") as string;
+        _keptValue ??= "No kept value";
+    }
+}