diff --git a/dotnet/src/Microsoft.AutoGen/AgentChat/Abstractions/Termination.cs b/dotnet/src/Microsoft.AutoGen/AgentChat/Abstractions/Termination.cs
index 21027cc36..f2ca40362 100644
--- a/dotnet/src/Microsoft.AutoGen/AgentChat/Abstractions/Termination.cs
+++ b/dotnet/src/Microsoft.AutoGen/AgentChat/Abstractions/Termination.cs
@@ -1,6 +1,3 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// Termination.cs
-
 namespace Microsoft.AutoGen.AgentChat.Abstractions;
 
 public static class TerminationConditionExtensions
diff --git a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/ExternalTermination.cs b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/ExternalTermination.cs
index 9d2155ce0..9b582aeea 100644
--- a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/ExternalTermination.cs
+++ b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/ExternalTermination.cs
@@ -1,6 +1,3 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// ExternalTermination.cs
-
 using Microsoft.AutoGen.AgentChat.Abstractions;
 
 namespace Microsoft.AutoGen.AgentChat.Terminations;
diff --git a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/FunctionCallTermination.cs b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/FunctionCallTermination.cs
index 20dd93769..e90aa3c3c 100644
--- a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/FunctionCallTermination.cs
+++ b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/FunctionCallTermination.cs
@@ -1,6 +1,3 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// FunctionCallTermination.cs
-
 using Microsoft.AutoGen.AgentChat.Abstractions;
 
 namespace Microsoft.AutoGen.AgentChat.Terminations;
diff --git a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/HandoffTermination.cs b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/HandoffTermination.cs
index 229466963..3e0a926b5 100644
--- a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/HandoffTermination.cs
+++ b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/HandoffTermination.cs
@@ -1,6 +1,3 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// HandoffTermination.cs
-
 using Microsoft.AutoGen.AgentChat.Abstractions;
 
 namespace Microsoft.AutoGen.AgentChat.Terminations;
diff --git a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/SourceMatchTermination.cs b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/SourceMatchTermination.cs
index e938e0e78..3cf51a8cd 100644
--- a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/SourceMatchTermination.cs
+++ b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/SourceMatchTermination.cs
@@ -1,6 +1,3 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// SourceMatchTermination.cs
-
 using Microsoft.AutoGen.AgentChat.Abstractions;
 
 namespace Microsoft.AutoGen.AgentChat.Terminations;
diff --git a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/StopMessageTermination.cs b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/StopMessageTermination.cs
index 194fe1afe..9402849e5 100644
--- a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/StopMessageTermination.cs
+++ b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/StopMessageTermination.cs
@@ -1,6 +1,3 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// StopMessageTermination.cs
-
 using Microsoft.AutoGen.AgentChat.Abstractions;
 
 namespace Microsoft.AutoGen.AgentChat.Terminations;
diff --git a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/TextMentionTermination.cs b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/TextMentionTermination.cs
index 95684a2bb..fecba2d5a 100644
--- a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/TextMentionTermination.cs
+++ b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/TextMentionTermination.cs
@@ -1,6 +1,3 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// TextMentionTermination.cs
-
 using Microsoft.AutoGen.AgentChat.Abstractions;
 using Microsoft.Extensions.AI;
 
diff --git a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/TokenUsageTermination.cs b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/TokenUsageTermination.cs
index a20ca4da2..090a019bc 100644
--- a/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/TokenUsageTermination.cs
+++ b/dotnet/src/Microsoft.AutoGen/AgentChat/Terminations/TokenUsageTermination.cs
@@ -1,6 +1,3 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// TokenUsageTermination.cs
-
 using Microsoft.AutoGen.AgentChat.Abstractions;
 
 namespace Microsoft.AutoGen.AgentChat.Terminations;
diff --git a/dotnet/test/Microsoft.AutoGen.AgentChat.Tests/TerminationConditionTests.cs b/dotnet/test/Microsoft.AutoGen.AgentChat.Tests/TerminationConditionTests.cs
index db54e456a..e84e423ce 100644
--- a/dotnet/test/Microsoft.AutoGen.AgentChat.Tests/TerminationConditionTests.cs
+++ b/dotnet/test/Microsoft.AutoGen.AgentChat.Tests/TerminationConditionTests.cs
@@ -1,6 +1,3 @@
-// Copyright (c) Microsoft Corporation. All rights reserved.
-// TerminationConditionTests.cs
-
 using FluentAssertions;
 using Microsoft.AutoGen.AgentChat.Abstractions;
 using Microsoft.AutoGen.AgentChat.Terminations;
@@ -473,4 +470,25 @@ public class TerminationConditionTests
         termination.Reset();
         termination.IsTerminated.Should().BeFalse();
     }
+
+    [Fact]
+    public async Task Test_SourceMatchTermination()
+    {
+        SourceMatchTermination termination = new("user", "agent");
+        termination.IsTerminated.Should().BeFalse();
+
+        TextMessage userMessage = new() { Content = "Hello", Source = "user" };
+        TextMessage agentMessage = new() { Content = "World", Source = "agent" };
+        TextMessage otherMessage = new() { Content = "Hi", Source = "other" };
+
+        await termination.InvokeExpectingNullAsync([]);
+        await termination.InvokeExpectingStopAsync([userMessage]);
+        await termination.InvokeExpectingStopAsync([agentMessage]);
+        await termination.InvokeExpectingNullAsync([otherMessage]);
+
+        await termination.InvokeExpectingFailureAsync([], reset: false);
+
+        termination.Reset();
+        termination.IsTerminated.Should().BeFalse();
+    }
 }