.NET: Seal ChatClientAgentThread (microsoft#2842)

Copilot · SergeyMenshykh · web-flow · commit 0aa0579b1b20 · 2026-01-06T10:44:13.000Z
* Initial plan

* Seal ChatClientAgentThread class

Co-authored-by: SergeyMenshykh &lt;68852919+SergeyMenshykh@users.noreply.github.com&gt;

---------

Co-authored-by: copilot-swe-agent[bot] &lt;198982749+Copilot@users.noreply.github.com&gt;
Co-authored-by: SergeyMenshykh &lt;68852919+SergeyMenshykh@users.noreply.github.com&gt;
diff --git a/dotnet/src/Microsoft.Agents.AI/ChatClient/ChatClientAgentThread.cs b/dotnet/src/Microsoft.Agents.AI/ChatClient/ChatClientAgentThread.cs
@@ -11,7 +11,7 @@ namespace Microsoft.Agents.AI;
 /// Provides a thread implementation for use with <see cref="ChatClientAgent"/>.
 /// </summary>
 [DebuggerDisplay("{DebuggerDisplay,nq}")]
-public class ChatClientAgentThread : AgentThread
+public sealed class ChatClientAgentThread : AgentThread
 {
     private ChatMessageStore? _messageStore;
 

Original file line number	Diff line number	Diff line change
`@@ -11,7 +11,7 @@ namespace Microsoft.Agents.AI;`
`11`	`11`	`/// Provides a thread implementation for use with <see cref="ChatClientAgent"/>.`
`12`	`12`	`/// </summary>`
`13`	`13`	`[DebuggerDisplay("{DebuggerDisplay,nq}")]`
`14`		`-public class ChatClientAgentThread : AgentThread`
	`14`	`+public sealed class ChatClientAgentThread : AgentThread`
`15`	`15`	`{`
`16`	`16`	`private ChatMessageStore? _messageStore;`
`17`	`17`