Consistent naming

Author: crickman

dotnet/samples/GettingStartedWithAgents/Step8_OpenAIAssistant.cs

@@ -57,7 +57,7 @@ await OpenAIAssistantAgent.CreateAsync(
         // Local function to invoke agent and display the conversation messages.
         async Task InvokeAgentAsync(string input)
         {
-            await agent.AddMessageToThreadAsync(threadId, new ChatMessageContent(AuthorRole.User, input));
+            await agent.AddChatMessageAsync(threadId, new ChatMessageContent(AuthorRole.User, input));
 
             Console.WriteLine($"# {AuthorRole.User}: '{input}'");
 

dotnet/src/Agents/OpenAI/OpenAIAssistantAgent.cs

@@ -211,7 +211,7 @@ public static async Task<bool> DeleteThreadAsync(
     /// <param name="threadId">The thread identifier</param>
     /// <param name="message">A non-system message with which to append to the conversation.</param>
     /// <param name="cancellationToken">The <see cref="CancellationToken"/> to monitor for cancellation requests. The default is <see cref="CancellationToken.None"/>.</param>
-    public Task AddThreadMessageAsync(string threadId, ChatMessageContent message, CancellationToken cancellationToken = default)
+    public Task AddChatMessageAsync(string threadId, ChatMessageContent message, CancellationToken cancellationToken = default)
     {
         this.ThrowIfDeleted();