diff --git a/dotnet/src/Microsoft.Agents.AI.Hosting/IsolationKeyScopedAgentSessionStore.cs b/dotnet/src/Microsoft.Agents.AI.Hosting/IsolationKeyScopedAgentSessionStore.cs
index d246abeb16..f379d625fd 100644
--- a/dotnet/src/Microsoft.Agents.AI.Hosting/IsolationKeyScopedAgentSessionStore.cs
+++ b/dotnet/src/Microsoft.Agents.AI.Hosting/IsolationKeyScopedAgentSessionStore.cs
@@ -3,7 +3,6 @@
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.Shared.Diagnostics;
 
 namespace Microsoft.Agents.AI.Hosting;