diff --git a/dotnet/src/Microsoft.Agents.AI.Hosting.AspNetCore/UserIdentityScopedSessionStore.cs b/dotnet/src/Microsoft.Agents.AI.Hosting.AspNetCore/UserIdentityScopedSessionStore.cs
index c1d6136239..8d9416f002 100644
--- a/dotnet/src/Microsoft.Agents.AI.Hosting.AspNetCore/UserIdentityScopedSessionStore.cs
+++ b/dotnet/src/Microsoft.Agents.AI.Hosting.AspNetCore/UserIdentityScopedSessionStore.cs
@@ -32,21 +32,17 @@ public class UserIdentityScopedSessionStore : DelegatingAgentSessionStore
     /// <param name="contextAccessor">
     /// The <see cref="IHttpContextAccessor"/> used to retrieve the current user's claims.
     /// </param>
-    /// <param name="claimType">
-    /// The claim type to extract from the user's identity for scoping. Defaults to <see cref="ClaimsIdentity.DefaultNameClaimType"/>.
-    /// </param>
-    /// <param name="strict">
-    /// If <see langword="true"/>, an exception is thrown when the specified claim is not found.
-    /// If <see langword="false"/>, the conversation ID is passed through unmodified when the claim is absent.
-    /// </param>
-    public UserIdentityScopedSessionStore(AgentSessionStore innerStore,
-                                          IHttpContextAccessor? contextAccessor,
-                                          string claimType = ClaimsIdentity.DefaultNameClaimType,
-                                          bool strict = true) : base(innerStore)
+    /// <param name="options">The options for configuring the session store. If null, defaults are used.</param>
+    public UserIdentityScopedSessionStore(
+        AgentSessionStore innerStore,
+        IHttpContextAccessor? contextAccessor,
+        UserIdentityScopedSessionStoreOptions? options = null) : base(innerStore)
     {
+        options ??= new UserIdentityScopedSessionStoreOptions();
+
         this._httpContextAccessor = contextAccessor;
-        this._claimType = Throw.IfNullOrWhitespace(claimType);
-        this._strict = strict;
+        this._claimType = Throw.IfNullOrWhitespace(options.ClaimType);
+        this._strict = options.Strict;
     }
 
     private string? GetScopeFromIdentity()
diff --git a/dotnet/src/Microsoft.Agents.AI.Hosting.AspNetCore/UserIdentityScopedSessionStoreOptions.cs b/dotnet/src/Microsoft.Agents.AI.Hosting.AspNetCore/UserIdentityScopedSessionStoreOptions.cs
new file mode 100644
index 0000000000..40c8b08b1b
--- /dev/null
+++ b/dotnet/src/Microsoft.Agents.AI.Hosting.AspNetCore/UserIdentityScopedSessionStoreOptions.cs
@@ -0,0 +1,29 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System.Security.Claims;
+
+namespace Microsoft.Agents.AI.Hosting;
+
+/// <summary>
+/// Options for configuring <see cref="UserIdentityScopedSessionStore"/>.
+/// </summary>
+public class UserIdentityScopedSessionStoreOptions
+{
+    /// <summary>
+    /// Gets or sets the claim type to extract from the user's identity for scoping.
+    /// </summary>
+    /// <remarks>
+    /// Defaults to <see cref="ClaimsIdentity.DefaultNameClaimType"/>.
+    /// </remarks>
+    public string ClaimType { get; set; } = ClaimsIdentity.DefaultNameClaimType;
+
+    /// <summary>
+    /// Gets or sets a value indicating whether an exception should be thrown when the specified claim is not found.
+    /// </summary>
+    /// <remarks>
+    /// If <see langword="true"/>, an exception is thrown when the specified claim is not found.
+    /// If <see langword="false"/>, the conversation ID is passed through unmodified when the claim is absent.
+    /// Defaults to <see langword="true"/>.
+    /// </remarks>
+    public bool Strict { get; set; } = true;
+}
diff --git a/dotnet/src/Microsoft.Agents.AI.Hosting/DelegatingAgentSessionStore.cs b/dotnet/src/Microsoft.Agents.AI.Hosting/DelegatingAgentSessionStore.cs
index a9c3d436df..6e8314a74c 100644
--- a/dotnet/src/Microsoft.Agents.AI.Hosting/DelegatingAgentSessionStore.cs
+++ b/dotnet/src/Microsoft.Agents.AI.Hosting/DelegatingAgentSessionStore.cs
@@ -14,7 +14,7 @@ namespace Microsoft.Agents.AI.Hosting;
 /// <remarks>
 /// <para>
 /// <see cref="DelegatingAgentSessionStore"/> implements the decorator pattern for <see cref="AgentSessionStore"/>s,
-/// enabling the creation of pipeliens where each layer can add functionality while delegating core operations to an
+/// enabling the creation of pipelines where each layer can add functionality while delegating core operations to an
 /// underlying store.
 /// </para>
 /// <para>
@@ -23,7 +23,7 @@ namespace Microsoft.Agents.AI.Hosting;
 /// interface.
 /// </para>
 /// </remarks>
-public class DelegatingAgentSessionStore : AgentSessionStore
+public abstract class DelegatingAgentSessionStore : AgentSessionStore
 {
     /// <summary>
     /// Initializes a new instance of the <see cref="DelegatingAgentSessionStore"/> class with the specified inner
diff --git a/dotnet/tests/Microsoft.Agents.AI.Hosting.UnitTests/UserIdentityScopedSessionStoreTests.cs b/dotnet/tests/Microsoft.Agents.AI.Hosting.UnitTests/UserIdentityScopedSessionStoreTests.cs
index 504c4177f7..3098ad9021 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Hosting.UnitTests/UserIdentityScopedSessionStoreTests.cs
+++ b/dotnet/tests/Microsoft.Agents.AI.Hosting.UnitTests/UserIdentityScopedSessionStoreTests.cs
@@ -52,7 +52,23 @@ public class UserIdentityScopedSessionStoreTests
     /// </summary>
     [Fact]
     public void RequiresInnerStore() =>
-        Assert.Throws<ArgumentNullException>("innerStore", () => new UserIdentityScopedSessionStore(null!, this._httpContextAccessorMock.Object));
+        Assert.Throws<ArgumentNullException>("innerStore", () => new UserIdentityScopedSessionStore(null!, this._httpContextAccessorMock.Object, CreateOptions()));
+
+    /// <summary>
+    /// Verify that constructor uses default options when options is null.
+    /// </summary>
+    [Fact]
+    public void UsesDefaultOptionsWhenNull()
+    {
+        // Arrange
+        this.SetupHttpContextWithClaim(ClaimsIdentity.DefaultNameClaimType, TestUserId);
+
+        // Act - should not throw and use default claim type
+        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, options: null);
+
+        // Assert
+        Assert.NotNull(store);
+    }
 
     /// <summary>
     /// Verify that constructor accepts null IHttpContextAccessor.
@@ -61,7 +77,7 @@ public class UserIdentityScopedSessionStoreTests
     public void Constructor_WithNullHttpContextAccessor_DoesNotThrow()
     {
         // Act & Assert - should not throw
-        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, contextAccessor: null, strict: false);
+        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, contextAccessor: null, CreateOptions(strict: false));
         Assert.NotNull(store);
     }
 
@@ -70,21 +86,21 @@ public class UserIdentityScopedSessionStoreTests
     /// </summary>
     [Fact]
     public void RequiresClaimType_NotNull() =>
-        Assert.Throws<ArgumentNullException>("claimType", () => new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, claimType: null!));
+        Assert.Throws<ArgumentNullException>("options.ClaimType", () => new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions(claimType: null!)));
 
     /// <summary>
     /// Verify that constructor throws ArgumentException when claimType is empty.
     /// </summary>
     [Fact]
     public void RequiresClaimType_NotEmpty() =>
-        Assert.Throws<ArgumentException>("claimType", () => new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, claimType: string.Empty));
+        Assert.Throws<ArgumentException>("options.ClaimType", () => new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions(claimType: string.Empty)));
 
     /// <summary>
     /// Verify that constructor throws ArgumentException when claimType is whitespace.
     /// </summary>
     [Fact]
     public void RequiresClaimType_NotWhitespace() =>
-        Assert.Throws<ArgumentException>("claimType", () => new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, claimType: "   "));
+        Assert.Throws<ArgumentException>("options.ClaimType", () => new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions(claimType: "   ")));
 
     #endregion
 
@@ -98,7 +114,7 @@ public class UserIdentityScopedSessionStoreTests
     {
         // Arrange
         this.SetupHttpContextWithClaim(ClaimsIdentity.DefaultNameClaimType, TestUserId);
-        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object);
+        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions());
 
         // Act
         await store.GetSessionAsync(this._agentMock.Object, TestConversationId);
@@ -123,7 +139,7 @@ public class UserIdentityScopedSessionStoreTests
         var store = new UserIdentityScopedSessionStore(
             this._innerStoreMock.Object,
             this._httpContextAccessorMock.Object,
-            claimType: CustomClaimType);
+            CreateOptions(claimType: CustomClaimType));
 
         // Act
         await store.GetSessionAsync(this._agentMock.Object, TestConversationId);
@@ -148,7 +164,7 @@ public class UserIdentityScopedSessionStoreTests
         var store = new UserIdentityScopedSessionStore(
             this._innerStoreMock.Object,
             this._httpContextAccessorMock.Object,
-            strict: true);
+            CreateOptions(strict: true));
 
         // Act & Assert
         var exception = await Assert.ThrowsAsync<InvalidOperationException>(
@@ -168,7 +184,7 @@ public class UserIdentityScopedSessionStoreTests
         var store = new UserIdentityScopedSessionStore(
             this._innerStoreMock.Object,
             this._httpContextAccessorMock.Object,
-            strict: false);
+            CreateOptions(strict: false));
 
         // Act - should not throw
         await store.GetSessionAsync(this._agentMock.Object, TestConversationId);
@@ -190,7 +206,7 @@ public class UserIdentityScopedSessionStoreTests
     {
         // Arrange
         this.SetupHttpContextWithClaim(ClaimsIdentity.DefaultNameClaimType, TestUserId);
-        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object);
+        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions());
 
         // Act
         var result = await store.GetSessionAsync(this._agentMock.Object, TestConversationId);
@@ -211,7 +227,7 @@ public class UserIdentityScopedSessionStoreTests
     {
         // Arrange
         this.SetupHttpContextWithClaim(ClaimsIdentity.DefaultNameClaimType, TestUserId);
-        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object);
+        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions());
         var sessionToSave = new TestAgentSession();
 
         // Act
@@ -238,7 +254,7 @@ public class UserIdentityScopedSessionStoreTests
         var store = new UserIdentityScopedSessionStore(
             this._innerStoreMock.Object,
             this._httpContextAccessorMock.Object,
-            claimType: CustomClaimType);
+            CreateOptions(claimType: CustomClaimType));
         var sessionToSave = new TestAgentSession();
 
         // Act
@@ -265,7 +281,7 @@ public class UserIdentityScopedSessionStoreTests
         var store = new UserIdentityScopedSessionStore(
             this._innerStoreMock.Object,
             this._httpContextAccessorMock.Object,
-            strict: true);
+            CreateOptions(strict: true));
         var sessionToSave = new TestAgentSession();
 
         // Act & Assert
@@ -286,7 +302,7 @@ public class UserIdentityScopedSessionStoreTests
         var store = new UserIdentityScopedSessionStore(
             this._innerStoreMock.Object,
             this._httpContextAccessorMock.Object,
-            strict: false);
+            CreateOptions(strict: false));
         var sessionToSave = new TestAgentSession();
 
         // Act - should not throw
@@ -317,7 +333,7 @@ public class UserIdentityScopedSessionStoreTests
         var store = new UserIdentityScopedSessionStore(
             this._innerStoreMock.Object,
             this._httpContextAccessorMock.Object,
-            strict: true);
+            CreateOptions(strict: true));
 
         // Act & Assert
         await Assert.ThrowsAsync<InvalidOperationException>(
@@ -335,7 +351,7 @@ public class UserIdentityScopedSessionStoreTests
         var store = new UserIdentityScopedSessionStore(
             this._innerStoreMock.Object,
             this._httpContextAccessorMock.Object,
-            strict: false);
+            CreateOptions(strict: false));
 
         // Act - should not throw
         await store.GetSessionAsync(this._agentMock.Object, TestConversationId);
@@ -376,12 +392,12 @@ public class UserIdentityScopedSessionStoreTests
 
         // Act - User 1
         this.SetupHttpContextWithClaim(ClaimsIdentity.DefaultNameClaimType, User1);
-        var store1 = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object);
+        var store1 = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions());
         await store1.GetSessionAsync(this._agentMock.Object, TestConversationId);
 
         // Act - User 2
         this.SetupHttpContextWithClaim(ClaimsIdentity.DefaultNameClaimType, User2);
-        var store2 = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object);
+        var store2 = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions());
         await store2.GetSessionAsync(this._agentMock.Object, TestConversationId);
 
         // Assert
@@ -399,7 +415,7 @@ public class UserIdentityScopedSessionStoreTests
         // Arrange
         const string UserIdWithColon = "user:with:colons";
         this.SetupHttpContextWithClaim(ClaimsIdentity.DefaultNameClaimType, UserIdWithColon);
-        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object);
+        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions());
 
         // Act
         await store.GetSessionAsync(this._agentMock.Object, TestConversationId);
@@ -422,7 +438,7 @@ public class UserIdentityScopedSessionStoreTests
         // Arrange
         const string UserIdWithBackslash = @"domain\user";
         this.SetupHttpContextWithClaim(ClaimsIdentity.DefaultNameClaimType, UserIdWithBackslash);
-        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object);
+        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions());
 
         // Act
         await store.GetSessionAsync(this._agentMock.Object, TestConversationId);
@@ -445,7 +461,7 @@ public class UserIdentityScopedSessionStoreTests
         // Arrange
         const string UserIdWithBoth = @"domain\user:role";
         this.SetupHttpContextWithClaim(ClaimsIdentity.DefaultNameClaimType, UserIdWithBoth);
-        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object);
+        var store = new UserIdentityScopedSessionStore(this._innerStoreMock.Object, this._httpContextAccessorMock.Object, CreateOptions());
 
         // Act
         await store.GetSessionAsync(this._agentMock.Object, TestConversationId);
@@ -463,6 +479,17 @@ public class UserIdentityScopedSessionStoreTests
 
     #region Helper Methods
 
+    private static UserIdentityScopedSessionStoreOptions CreateOptions(
+        string? claimType = ClaimsIdentity.DefaultNameClaimType,
+        bool strict = true)
+    {
+        return new UserIdentityScopedSessionStoreOptions
+        {
+            ClaimType = claimType!,
+            Strict = strict
+        };
+    }
+
     private void SetupHttpContextWithClaim(string claimType, string claimValue)
     {
         var claims = new[] { new Claim(claimType, claimValue) };