diff --git a/lib/csharp/src/Properties/AssemblyInfo.cs b/lib/csharp/src/Properties/AssemblyInfo.cs
index dcbe747..23fbc73 100644
--- a/lib/csharp/src/Properties/AssemblyInfo.cs
+++ b/lib/csharp/src/Properties/AssemblyInfo.cs
@@ -51,5 +51,5 @@
 //
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
-[assembly: AssemblyVersion("1.0.0.1")]
-[assembly: AssemblyFileVersion("1.0.0.1")]
+[assembly: AssemblyVersion("0.12.0.1")]
+[assembly: AssemblyFileVersion("0.12.0.1")]
diff --git a/lib/csharp/src/Thrift.csproj b/lib/csharp/src/Thrift.csproj
index 83bc4f7..ede152d 100644
--- a/lib/csharp/src/Thrift.csproj
+++ b/lib/csharp/src/Thrift.csproj
@@ -45,7 +45,7 @@
     <UpdateRequired>false</UpdateRequired>
     <MapFileExtensions>true</MapFileExtensions>
     <ApplicationRevision>0</ApplicationRevision>
-    <ApplicationVersion>1.0.0.%2a</ApplicationVersion>
+    <ApplicationVersion>0.12.0.%2a</ApplicationVersion>
     <IsWebBootstrapper>false</IsWebBootstrapper>
     <UseApplicationTrust>false</UseApplicationTrust>
     <BootstrapperEnabled>true</BootstrapperEnabled>
@@ -153,4 +153,4 @@
   <ProjectExtensions>
     <VisualStudio AllowExistingFolder="true" />
   </ProjectExtensions>
-</Project>
\ No newline at end of file
+</Project>