diff --git a/dotnet/nuget/nuget-package.props b/dotnet/nuget/nuget-package.props
index 9d91eebf28..d619ac6c9f 100644
--- a/dotnet/nuget/nuget-package.props
+++ b/dotnet/nuget/nuget-package.props
@@ -1,16 +1,18 @@
 <Project>
   <PropertyGroup>
     <!-- Central version prefix - applies to all nuget packages. -->
-    <VersionPrefix>1.1.0</VersionPrefix>
+    <VersionPrefix>0.0.1</VersionPrefix>
     <RCNumber>1</RCNumber>
     <PackageVersion Condition="'$(IsReleaseCandidate)' == 'true'">$(VersionPrefix)-rc$(RCNumber)</PackageVersion>
-    <PackageVersion Condition="'$(IsReleaseCandidate)' != 'true' AND '$(VersionSuffix)' != ''">$(VersionPrefix)-$(VersionSuffix).260410.1</PackageVersion>
-    <PackageVersion Condition="'$(IsReleaseCandidate)' != 'true' AND '$(VersionSuffix)' == ''">$(VersionPrefix)-preview.260410.1</PackageVersion>
+    <PackageVersion Condition="'$(IsReleaseCandidate)' != 'true' AND '$(VersionSuffix)' != ''">$(VersionPrefix)-$(VersionSuffix).260417.1</PackageVersion>
+    <PackageVersion Condition="'$(IsReleaseCandidate)' != 'true' AND '$(VersionSuffix)' == ''">$(VersionPrefix)-preview.260417.1</PackageVersion>
     <PackageVersion Condition="'$(IsReleased)' == 'true'">$(VersionPrefix)</PackageVersion>
-    <GitTag>1.1.0</GitTag>
+    <GitTag>0.0.1</GitTag>
 
     <Configurations>Debug;Release;Publish</Configurations>
-    <IsPackable>true</IsPackable>
+    <!-- IsPackable intentionally NOT set to true here. Packaging is opt-in per project for this branch. -->
+    <!-- The repo default in dotnet/Directory.Build.props keeps IsPackable=false. -->
+    <!-- Only the Foundry preview set explicitly overrides IsPackable=true in their csproj. -->
 
     <!-- Package validation. Baseline Version should be the latest version available on NuGet. -->
     <PackageValidationBaselineVersion>1.0.0</PackageValidationBaselineVersion>
@@ -70,7 +72,7 @@
     <None Include="$(RepoRoot)/dotnet/nuget/NUGET.md" Link="NUGET.md" Pack="true" PackagePath="." />
   </ItemGroup>
 
-  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
+  <PropertyGroup Condition=" '$(Configuration)' == 'Release' AND '$(IsPackable)' == 'true' ">
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
   </PropertyGroup>
 </Project>
diff --git a/dotnet/src/Microsoft.Agents.AI.Abstractions/Microsoft.Agents.AI.Abstractions.csproj b/dotnet/src/Microsoft.Agents.AI.Abstractions/Microsoft.Agents.AI.Abstractions.csproj
index 9f5668c812..4bf1eb9d54 100644
--- a/dotnet/src/Microsoft.Agents.AI.Abstractions/Microsoft.Agents.AI.Abstractions.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Abstractions/Microsoft.Agents.AI.Abstractions.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <RootNamespace>Microsoft.Agents.AI</RootNamespace>
     <NoWarn>$(NoWarn);MEAI001</NoWarn>
-    <IsReleased>true</IsReleased>
+    <IsReleased>false</IsReleased>
   </PropertyGroup>
 
   <PropertyGroup>
@@ -20,6 +20,11 @@
 
   <Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />
 
+  <!-- Foundry preview release: opt back in to packaging. -->
+  <PropertyGroup>
+    <IsPackable>true</IsPackable>
+  </PropertyGroup>
+
   <PropertyGroup>
     <!-- NuGet Package Settings -->
     <Title>Microsoft Agent Framework Abstractions</Title>
diff --git a/dotnet/src/Microsoft.Agents.AI.Foundry/Microsoft.Agents.AI.Foundry.csproj b/dotnet/src/Microsoft.Agents.AI.Foundry/Microsoft.Agents.AI.Foundry.csproj
index e3c1773941..67c069cb5b 100644
--- a/dotnet/src/Microsoft.Agents.AI.Foundry/Microsoft.Agents.AI.Foundry.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Foundry/Microsoft.Agents.AI.Foundry.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <IsReleased>true</IsReleased>
+    <IsReleased>false</IsReleased>
     <InjectSharedThrow>true</InjectSharedThrow>
     <NoWarn>$(NoWarn);OPENAI001;MEAI001;NU1903</NoWarn>
     <CentralPackageTransitivePinningEnabled>false</CentralPackageTransitivePinningEnabled>
@@ -9,6 +9,11 @@
 
   <Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />
 
+  <!-- Foundry preview release: opt back in to packaging. -->
+  <PropertyGroup>
+    <IsPackable>true</IsPackable>
+  </PropertyGroup>
+
   <!-- Disable package validation baseline until the first release under the new package name -->
   <PropertyGroup>
     <PackageValidationBaselineVersion />
diff --git a/dotnet/src/Microsoft.Agents.AI.Workflows.Generators/Microsoft.Agents.AI.Workflows.Generators.csproj b/dotnet/src/Microsoft.Agents.AI.Workflows.Generators/Microsoft.Agents.AI.Workflows.Generators.csproj
index 765de06c7b..fbaa90cb2c 100644
--- a/dotnet/src/Microsoft.Agents.AI.Workflows.Generators/Microsoft.Agents.AI.Workflows.Generators.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Workflows.Generators/Microsoft.Agents.AI.Workflows.Generators.csproj
@@ -29,11 +29,16 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <IsReleased>true</IsReleased>
+    <IsReleased>false</IsReleased>
   </PropertyGroup>
 
   <Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />
 
+  <!-- Foundry preview release: opt back in to packaging. -->
+  <PropertyGroup>
+    <IsPackable>true</IsPackable>
+  </PropertyGroup>
+
   <PropertyGroup>
     <!-- NuGet Package Settings -->
     <Title>Microsoft Agent Framework Workflows Source Generators</Title>
diff --git a/dotnet/src/Microsoft.Agents.AI.Workflows/Microsoft.Agents.AI.Workflows.csproj b/dotnet/src/Microsoft.Agents.AI.Workflows/Microsoft.Agents.AI.Workflows.csproj
index 032314c657..51119bbc63 100644
--- a/dotnet/src/Microsoft.Agents.AI.Workflows/Microsoft.Agents.AI.Workflows.csproj
+++ b/dotnet/src/Microsoft.Agents.AI.Workflows/Microsoft.Agents.AI.Workflows.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <IsReleased>true</IsReleased>
+    <IsReleased>false</IsReleased>
     <NoWarn>$(NoWarn);MEAI001</NoWarn>
   </PropertyGroup>
 
@@ -14,6 +14,11 @@
 
   <Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />
 
+  <!-- Foundry preview release: opt back in to packaging. -->
+  <PropertyGroup>
+    <IsPackable>true</IsPackable>
+  </PropertyGroup>
+
   <PropertyGroup>
     <!-- NuGet Package Settings -->
     <Title>Microsoft Agent Framework Workflows</Title>
diff --git a/dotnet/src/Microsoft.Agents.AI/Microsoft.Agents.AI.csproj b/dotnet/src/Microsoft.Agents.AI/Microsoft.Agents.AI.csproj
index 10e92850d5..428385cadf 100644
--- a/dotnet/src/Microsoft.Agents.AI/Microsoft.Agents.AI.csproj
+++ b/dotnet/src/Microsoft.Agents.AI/Microsoft.Agents.AI.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <IsReleased>true</IsReleased>
+    <IsReleased>false</IsReleased>
     <NoWarn>$(NoWarn);MEAI001;MAAI001</NoWarn>
   </PropertyGroup>
 
@@ -17,6 +17,11 @@
 
   <Import Project="$(RepoRoot)/dotnet/nuget/nuget-package.props" />
 
+  <!-- Foundry preview release: opt back in to packaging. -->
+  <PropertyGroup>
+    <IsPackable>true</IsPackable>
+  </PropertyGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\Microsoft.Agents.AI.Abstractions\Microsoft.Agents.AI.Abstractions.csproj" />
   </ItemGroup>