MSBuild Fail Error: The type 'Silverlight.Web.User' already contains a definition for 'DisplayName'

MSBuild Fail Error: The type 'Silverlight.Web.User' already contains a definition for 'DisplayName' I got this error when I was trying to make automated build for Silverlight 4.0 application using TFS 2010. The complete error was "Generated_Code\Models\Shared\User.shared.cs (13): The type 'MSIT.ES.SDPvNext.SilverlightUX.Web.User' already contains a definition for 'DisplayName'" I resolved this issues by changing Platform and Configuration combination on the TfsBuild.proj file previously it was "Release|x86" and on the Build Definition window, change the MSBuild Platform from Auto to x86. TfsBuild.proj <ItemGroup>     <ConfigurationToBuild Include="Release|AnyCPU">       <FlavorToBuild>Release</FlavorToBuild>       <PlatformToBuild>AnyCPU</PlatformToBuild>     </ConfigurationToBuild> </ItemGroup> Build Definition Window