diff --git a/dotnet/Directory.Packages.props b/dotnet/Directory.Packages.props
index d322b4d679..dc840265d6 100644
--- a/dotnet/Directory.Packages.props
+++ b/dotnet/Directory.Packages.props
@@ -149,6 +149,7 @@
     <!-- Symbols -->
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
     <!-- Toolset -->
+    <PackageVersion Include="ReferenceTrimmer" Version="3.4.5" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.14.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="10.0.100" />
diff --git a/dotnet/samples/02-agents/AgentProviders/Agent_With_CustomImplementation/Agent_With_CustomImplementation.csproj b/dotnet/samples/02-agents/AgentProviders/Agent_With_CustomImplementation/Agent_With_CustomImplementation.csproj
index 945912bfd4..409693f2fd 100644
--- a/dotnet/samples/02-agents/AgentProviders/Agent_With_CustomImplementation/Agent_With_CustomImplementation.csproj
+++ b/dotnet/samples/02-agents/AgentProviders/Agent_With_CustomImplementation/Agent_With_CustomImplementation.csproj
@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI\Microsoft.Agents.AI.csproj" />
+    <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.Abstractions\Microsoft.Agents.AI.Abstractions.csproj" />
   </ItemGroup>
 
 </Project>
diff --git a/dotnet/samples/02-agents/Agents/Agent_Step17_AdditionalAIContext/Agent_Step17_AdditionalAIContext.csproj b/dotnet/samples/02-agents/Agents/Agent_Step17_AdditionalAIContext/Agent_Step17_AdditionalAIContext.csproj
index 99073874ee..a47c262d42 100644
--- a/dotnet/samples/02-agents/Agents/Agent_Step17_AdditionalAIContext/Agent_Step17_AdditionalAIContext.csproj
+++ b/dotnet/samples/02-agents/Agents/Agent_Step17_AdditionalAIContext/Agent_Step17_AdditionalAIContext.csproj
@@ -12,13 +12,9 @@
     <PackageReference Include="Azure.AI.OpenAI" />
     <PackageReference Include="Azure.Identity" />
     <PackageReference Include="Microsoft.Extensions.AI.OpenAI" />
-    <PackageReference Include="Microsoft.Agents.ObjectModel" />
-    <PackageReference Include="Microsoft.Agents.ObjectModel.Json" />
-    <PackageReference Include="Microsoft.Agents.ObjectModel.PowerFx" />
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.Declarative\Microsoft.Agents.AI.Declarative.csproj" />
     <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.OpenAI\Microsoft.Agents.AI.OpenAI.csproj" />
   </ItemGroup>
 
diff --git a/dotnet/samples/04-hosting/A2A/A2AAgent_PollingForTaskCompletion/A2AAgent_PollingForTaskCompletion.csproj b/dotnet/samples/04-hosting/A2A/A2AAgent_PollingForTaskCompletion/A2AAgent_PollingForTaskCompletion.csproj
index 1f36cef576..1bccc99d4f 100644
--- a/dotnet/samples/04-hosting/A2A/A2AAgent_PollingForTaskCompletion/A2AAgent_PollingForTaskCompletion.csproj
+++ b/dotnet/samples/04-hosting/A2A/A2AAgent_PollingForTaskCompletion/A2AAgent_PollingForTaskCompletion.csproj
@@ -14,7 +14,6 @@
     <PackageReference Include="Azure.Identity" />
     <PackageReference Include="Microsoft.Extensions.Hosting" />
     <PackageReference Include="System.Net.ServerSentEvents" />
-    <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/dotnet/samples/05-end-to-end/AGUIClientServer/AGUIDojoServer/AGUIDojoServer.csproj b/dotnet/samples/05-end-to-end/AGUIClientServer/AGUIDojoServer/AGUIDojoServer.csproj
index eb2dc3f77e..96a72d1109 100644
--- a/dotnet/samples/05-end-to-end/AGUIClientServer/AGUIDojoServer/AGUIDojoServer.csproj
+++ b/dotnet/samples/05-end-to-end/AGUIClientServer/AGUIDojoServer/AGUIDojoServer.csproj
@@ -15,7 +15,6 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.Hosting.AGUI.AspNetCore\Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.csproj" />
-    <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.AGUI\Microsoft.Agents.AI.AGUI.csproj" />
     <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.OpenAI\Microsoft.Agents.AI.OpenAI.csproj" />
   </ItemGroup>
 
diff --git a/dotnet/samples/05-end-to-end/AgentWebChat/AgentWebChat.Web/AgentWebChat.Web.csproj b/dotnet/samples/05-end-to-end/AgentWebChat/AgentWebChat.Web/AgentWebChat.Web.csproj
index 5335499168..8f5d432c7b 100644
--- a/dotnet/samples/05-end-to-end/AgentWebChat/AgentWebChat.Web/AgentWebChat.Web.csproj
+++ b/dotnet/samples/05-end-to-end/AgentWebChat/AgentWebChat.Web/AgentWebChat.Web.csproj
@@ -9,10 +9,12 @@
   
   <ItemGroup>
     <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.Hosting.A2A\Microsoft.Agents.AI.Hosting.A2A.csproj" />
-	  <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.Hosting.OpenAI\Microsoft.Agents.AI.Hosting.OpenAI.csproj" />
-    <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.Hosting\Microsoft.Agents.AI.Hosting.csproj" />
     <ProjectReference Include="..\AgentWebChat.ServiceDefaults\AgentWebChat.ServiceDefaults.csproj" />
     <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.Abstractions\Microsoft.Agents.AI.Abstractions.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="OpenAI" />
+    <PackageReference Include="Microsoft.Extensions.AI.OpenAI" />
+  </ItemGroup>
 </Project>
diff --git a/dotnet/src/Directory.Build.props b/dotnet/src/Directory.Build.props
new file mode 100644
index 0000000000..d4ac526fc9
--- /dev/null
+++ b/dotnet/src/Directory.Build.props
@@ -0,0 +1,9 @@
+<Project>
+
+  <Import Project="../Directory.Build.props" />
+
+  <ItemGroup>
+    <PackageReference Include="ReferenceTrimmer" PrivateAssets="all" IncludeAssets="build;analyzers;buildTransitive" />
+  </ItemGroup>
+
+</Project>
diff --git a/dotnet/src/Microsoft.Agents.AI.AGUI/Microsoft.Agents.AI.AGUI.csproj b/dotnet/src/Microsoft.Agents.AI.AGUI/Microsoft.Agents.AI.AGUI.csproj
index 57cb375e14..7fbcfa5237 100644
--- a/dotnet/src/Microsoft.Agents.AI.AGUI/Microsoft.Agents.AI.AGUI.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.AGUI/Microsoft.Agents.AI.AGUI.csproj
@@ -16,12 +16,9 @@
     <Description>Provides Microsoft Agent Framework support for Agent-User Interaction (AG-UI) protocol client functionality.</Description>
   </PropertyGroup>
 
-  <ItemGroup>
-    <ProjectReference Include="..\Microsoft.Agents.AI.Abstractions\Microsoft.Agents.AI.Abstractions.csproj" />
-  </ItemGroup>
-
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.AI" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
     <PackageReference Include="System.Net.ServerSentEvents" />
     <PackageReference Include="System.Net.Http.Json" />
     <PackageReference Include="System.Threading.Channels" />
diff --git a/dotnet/src/Microsoft.Agents.AI.Abstractions/Microsoft.Agents.AI.Abstractions.csproj b/dotnet/src/Microsoft.Agents.AI.Abstractions/Microsoft.Agents.AI.Abstractions.csproj
index e31093e174..9acfb1fab3 100644
--- a/dotnet/src/Microsoft.Agents.AI.Abstractions/Microsoft.Agents.AI.Abstractions.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Abstractions/Microsoft.Agents.AI.Abstractions.csproj
@@ -28,7 +28,6 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.AI.Abstractions" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/dotnet/src/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.csproj b/dotnet/src/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.csproj
index 8f6ac4de24..d6169ad805 100644
--- a/dotnet/src/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.csproj
@@ -18,7 +18,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\Microsoft.Agents.AI.Hosting\Microsoft.Agents.AI.Hosting.csproj" />
+    <ProjectReference Include="..\Microsoft.Agents.AI\Microsoft.Agents.AI.csproj" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/dotnet/src/Microsoft.Agents.AI.Mem0/Microsoft.Agents.AI.Mem0.csproj b/dotnet/src/Microsoft.Agents.AI.Mem0/Microsoft.Agents.AI.Mem0.csproj
index 19a5019843..52bcdda165 100644
--- a/dotnet/src/Microsoft.Agents.AI.Mem0/Microsoft.Agents.AI.Mem0.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Mem0/Microsoft.Agents.AI.Mem0.csproj
@@ -15,6 +15,10 @@
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\Microsoft.Agents.AI.Abstractions\Microsoft.Agents.AI.Abstractions.csproj" />
   </ItemGroup>
diff --git a/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative/Microsoft.Agents.AI.Workflows.Declarative.csproj b/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative/Microsoft.Agents.AI.Workflows.Declarative.csproj
index b8b32f3b06..d0ba8406b5 100644
--- a/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative/Microsoft.Agents.AI.Workflows.Declarative.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Workflows.Declarative/Microsoft.Agents.AI.Workflows.Declarative.csproj
@@ -26,7 +26,7 @@
     <PackageReference Include="Microsoft.PowerFx.Interpreter" />
     <PackageReference Include="Microsoft.Extensions.Configuration" />
     <PackageReference Include="Microsoft.Extensions.Logging" />
-    <PackageReference Include="System.CodeDom" />
+    <PackageReference Include="System.CodeDom" TreatAsUsed="true" />
     <PackageReference Include="System.Collections.Immutable" />
   </ItemGroup>
 
diff --git a/dotnet/tests/Microsoft.Agents.AI.DevUI.UnitTests/Microsoft.Agents.AI.DevUI.UnitTests.csproj b/dotnet/tests/Microsoft.Agents.AI.DevUI.UnitTests/Microsoft.Agents.AI.DevUI.UnitTests.csproj
index 1fc964e702..7c0113faab 100644
--- a/dotnet/tests/Microsoft.Agents.AI.DevUI.UnitTests/Microsoft.Agents.AI.DevUI.UnitTests.csproj
+++ b/dotnet/tests/Microsoft.Agents.AI.DevUI.UnitTests/Microsoft.Agents.AI.DevUI.UnitTests.csproj
@@ -8,7 +8,6 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.TestHost" />
-    <PackageReference Include="OpenAI" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/dotnet/tests/Microsoft.Agents.AI.Hosting.A2A.UnitTests/Microsoft.Agents.AI.Hosting.A2A.UnitTests.csproj b/dotnet/tests/Microsoft.Agents.AI.Hosting.A2A.UnitTests/Microsoft.Agents.AI.Hosting.A2A.UnitTests.csproj
index 42d8682870..3ea3d11e05 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Hosting.A2A.UnitTests/Microsoft.Agents.AI.Hosting.A2A.UnitTests.csproj
+++ b/dotnet/tests/Microsoft.Agents.AI.Hosting.A2A.UnitTests/Microsoft.Agents.AI.Hosting.A2A.UnitTests.csproj
@@ -10,7 +10,6 @@
 
   <ItemGroup Condition="!$([MSBuild]::IsTargetFrameworkCompatible($(TargetFramework), 'net10.0'))">
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" />
-    <PackageReference Include="System.Linq.AsyncEnumerable" />
   </ItemGroup>
   
   <ItemGroup>
diff --git a/dotnet/tests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.IntegrationTests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.IntegrationTests.csproj b/dotnet/tests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.IntegrationTests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.IntegrationTests.csproj
index 6b909fd4f2..490f816cd4 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.IntegrationTests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.IntegrationTests.csproj
+++ b/dotnet/tests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.IntegrationTests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.IntegrationTests.csproj
@@ -6,7 +6,6 @@
 
   <PropertyGroup>
     <InjectSharedIntegrationTestCode>true</InjectSharedIntegrationTestCode>
-    <InjectSharedBuildTestCode>true</InjectSharedBuildTestCode>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/dotnet/tests/Microsoft.Agents.AI.Workflows.Declarative.IntegrationTests/Microsoft.Agents.AI.Workflows.Declarative.IntegrationTests.csproj b/dotnet/tests/Microsoft.Agents.AI.Workflows.Declarative.IntegrationTests/Microsoft.Agents.AI.Workflows.Declarative.IntegrationTests.csproj
index d37dd58c8c..37c0fa98cf 100644
--- a/dotnet/tests/Microsoft.Agents.AI.Workflows.Declarative.IntegrationTests/Microsoft.Agents.AI.Workflows.Declarative.IntegrationTests.csproj
+++ b/dotnet/tests/Microsoft.Agents.AI.Workflows.Declarative.IntegrationTests/Microsoft.Agents.AI.Workflows.Declarative.IntegrationTests.csproj
@@ -16,7 +16,6 @@
 
   <ItemGroup>
     <PackageReference Include="Azure.Identity" />
-    <PackageReference Include="FluentAssertions" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" />
     <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" />
     <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" />