New Post: Imported project 'xxx' was not found.

Thanks mikefourie, it works. Now I am getting the below build error,

The expression "@(OutputPath)\PerformanceAfter.dll" cannot be used in this context. Item lists cannot be concatenated with other strings where an item list is expected. Use a semicolon to separate multiple item lists.

<MSBuild.ExtensionPack.FrameWork.Assembly TaskAction="GetInfo" NetAssembly="@(OutputPath)\PerformanceAfter.dll">
      <Output TaskParameter="OutputItems" ItemName="Info" />
    </MSBuild.ExtensionPack.FrameWork.Assembly>