diff --git a/.azure/pipelines/build.yaml b/.azure/pipelines/build.yaml
index 3d25dfa920a4..6f21e59b00f3 100644
--- a/.azure/pipelines/build.yaml
+++ b/.azure/pipelines/build.yaml
@@ -30,7 +30,7 @@ parameters:
   - name: version_suffix
     displayName: Version suffix
     type: string
-    default: ci.$(Build.BuildNumber)
+    default: dev.$(Build.BuildNumber)
   - name: codesign
     displayName: Enable code signing
     type: boolean
diff --git a/dotnet/Directory.Build.props b/dotnet/Directory.Build.props
index aa4a0673a0f7..e548a4b7ea83 100644
--- a/dotnet/Directory.Build.props
+++ b/dotnet/Directory.Build.props
@@ -21,7 +21,6 @@
     <EnableNetAnalyzers>true</EnableNetAnalyzers>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
     <IsTestProject>false</IsTestProject>
-
     <DebugType>embedded</DebugType>
     <DebugSymbols>true</DebugSymbols>
   </PropertyGroup>
@@ -30,6 +29,11 @@
     <RepoRoot>$(MSBuildThisFileDirectory)</RepoRoot>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(MSBuildProjectName.StartsWith(`AutoGen`))' == 'true'">
+    <VersionPrefix>$(VersionPrefixForAutoGen0_2)</VersionPrefix>
+    <IsAutoGen0_2>true</IsAutoGen0_2>
+  </PropertyGroup>
+
   <PropertyGroup Condition="'$(IsTestProject)' == 'true'">
     <NoWarn>$(NoWarn);CA1829</NoWarn>
   </PropertyGroup>
diff --git a/dotnet/eng/MetaInfo.props b/dotnet/eng/MetaInfo.props
index 4f3d216aa08c..db46778a06c2 100644
--- a/dotnet/eng/MetaInfo.props
+++ b/dotnet/eng/MetaInfo.props
@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     <PropertyGroup>
-        <VersionPrefix>0.2.2</VersionPrefix>
+        <VersionPrefix>0.4.0</VersionPrefix>
+        <VersionPrefixForAutoGen0_2>0.2.2</VersionPrefixForAutoGen0_2>
         <Authors>AutoGen</Authors>
         <PackageProjectUrl>https://microsoft.github.io/autogen-for-net/</PackageProjectUrl>
         <RepositoryUrl>https://github.com/microsoft/autogen</RepositoryUrl>
diff --git a/dotnet/samples/dev-team/DevTeam.Backend/DevTeam.Backend.csproj b/dotnet/samples/dev-team/DevTeam.Backend/DevTeam.Backend.csproj
index fced2a905aa2..10e05cfb2107 100644
--- a/dotnet/samples/dev-team/DevTeam.Backend/DevTeam.Backend.csproj
+++ b/dotnet/samples/dev-team/DevTeam.Backend/DevTeam.Backend.csproj
@@ -29,7 +29,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\..\src\Microsoft.AutoGen\Extensions\ServiceDefaults\Microsoft.AutoGen.Extensions.Aspire.csproj" />
+    <ProjectReference Include="..\..\..\src\Microsoft.AutoGen\Extensions\Aspire\Microsoft.AutoGen.Extensions.Aspire.csproj" />
     <ProjectReference Include="..\DevTeam.Shared\DevTeam.Shared.csproj" />
     <ProjectReference Include="..\..\..\src\Microsoft.AutoGen\Extensions\SemanticKernel\Microsoft.AutoGen.Extensions.SemanticKernel.csproj" />
   </ItemGroup>
diff --git a/dotnet/src/Microsoft.AutoGen/Abstractions/Microsoft.AutoGen.Abstractions.csproj b/dotnet/src/Microsoft.AutoGen/Abstractions/Microsoft.AutoGen.Abstractions.csproj
index 219d7960760a..d9596f607ccb 100644
--- a/dotnet/src/Microsoft.AutoGen/Abstractions/Microsoft.AutoGen.Abstractions.csproj
+++ b/dotnet/src/Microsoft.AutoGen/Abstractions/Microsoft.AutoGen.Abstractions.csproj
@@ -6,6 +6,8 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <Import Project="$(RepoRoot)/nuget/nuget-package.props" />
+
   <ItemGroup>
     <Protobuf Include="..\..\..\..\protos\agent_worker.proto" GrpcServices="Client;Server" Link="Protos\agent_worker.proto" />
     <Protobuf Include="..\..\..\..\protos\cloudevent.proto" GrpcServices="Client;Server" Link="Protos\cloudevent.proto" />
diff --git a/dotnet/src/Microsoft.AutoGen/Agents/Microsoft.AutoGen.Agents.csproj b/dotnet/src/Microsoft.AutoGen/Agents/Microsoft.AutoGen.Agents.csproj
index 4861182adf56..aa79cf9665ae 100644
--- a/dotnet/src/Microsoft.AutoGen/Agents/Microsoft.AutoGen.Agents.csproj
+++ b/dotnet/src/Microsoft.AutoGen/Agents/Microsoft.AutoGen.Agents.csproj
@@ -6,6 +6,9 @@
 		<Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <Import Project="$(RepoRoot)/nuget/nuget-package.props" />
+
+
 	<ItemGroup>
 		<ProjectReference Include="..\Abstractions\Microsoft.AutoGen.Abstractions.csproj" />
 		<ProjectReference Include="..\Extensions\Aspire\Microsoft.AutoGen.Extensions.Aspire.csproj" />
diff --git a/dotnet/src/Microsoft.AutoGen/Extensions/Aspire/Microsoft.AutoGen.Extensions.Aspire.csproj b/dotnet/src/Microsoft.AutoGen/Extensions/Aspire/Microsoft.AutoGen.Extensions.Aspire.csproj
index cf2446f93349..0cab61bc27b6 100644
--- a/dotnet/src/Microsoft.AutoGen/Extensions/Aspire/Microsoft.AutoGen.Extensions.Aspire.csproj
+++ b/dotnet/src/Microsoft.AutoGen/Extensions/Aspire/Microsoft.AutoGen.Extensions.Aspire.csproj
@@ -5,6 +5,9 @@
     <Nullable>enable</Nullable>
     <IsAspireSharedProject>true</IsAspireSharedProject>
   </PropertyGroup>
+
+  <Import Project="$(RepoRoot)/nuget/nuget-package.props" />
+
  <ItemGroup>
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
     <PackageReference Include="Microsoft.Extensions.Http.Resilience" />
diff --git a/dotnet/src/Microsoft.AutoGen/Extensions/MEAI/Microsoft.AutoGen.Extensions.MEAI.csproj b/dotnet/src/Microsoft.AutoGen/Extensions/MEAI/Microsoft.AutoGen.Extensions.MEAI.csproj
index f9e9ac0dfab5..b8233a8e6c50 100644
--- a/dotnet/src/Microsoft.AutoGen/Extensions/MEAI/Microsoft.AutoGen.Extensions.MEAI.csproj
+++ b/dotnet/src/Microsoft.AutoGen/Extensions/MEAI/Microsoft.AutoGen.Extensions.MEAI.csproj
@@ -4,6 +4,9 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
+
+  <Import Project="$(RepoRoot)/nuget/nuget-package.props" />
+
   <ItemGroup>
     <PackageReference Include="Aspire.Azure.AI.OpenAI" />
     <PackageReference Include="Azure.AI.OpenAI" />
diff --git a/dotnet/src/Microsoft.AutoGen/Extensions/SemanticKernel/Microsoft.AutoGen.Extensions.SemanticKernel.csproj b/dotnet/src/Microsoft.AutoGen/Extensions/SemanticKernel/Microsoft.AutoGen.Extensions.SemanticKernel.csproj
index 6ee4530895af..c4ac5536e70c 100644
--- a/dotnet/src/Microsoft.AutoGen/Extensions/SemanticKernel/Microsoft.AutoGen.Extensions.SemanticKernel.csproj
+++ b/dotnet/src/Microsoft.AutoGen/Extensions/SemanticKernel/Microsoft.AutoGen.Extensions.SemanticKernel.csproj
@@ -5,6 +5,8 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <Import Project="$(RepoRoot)/nuget/nuget-package.props" />
+
   <ItemGroup>
 	  <PackageReference Include="Azure.AI.OpenAI" />
 	  <PackageReference Include="Microsoft.SemanticKernel" />