diff --git a/dotnet/src/Microsoft.AutoGen/Agents/AgentBase.cs b/dotnet/src/Microsoft.AutoGen/Agents/AgentBase.cs
index 674ddca9d1..cbae4eb1cc 100644
--- a/dotnet/src/Microsoft.AutoGen/Agents/AgentBase.cs
+++ b/dotnet/src/Microsoft.AutoGen/Agents/AgentBase.cs
@@ -34,8 +34,6 @@ public abstract class AgentBase : IAgentBase, IHandle
 
     internal Task Completion { get; }
 
-    Abstractions.AgentId IAgentBase.AgentId => throw new NotImplementedException();
-
     internal Task Start()
     {
         var didSuppress = false;