title: Creating a nuget package containing a custom build step for .NET Core
body: <p>Is it possible to create a nuget package containing a custom build step (analyzing the generated assembly and automatically generating some metadata)? The target environment should be .NET Core with the new .csproj format (Currently using Visual Studio 2017 RC). Best case would be if this only adds a msbuild step and no dependency to the projects resulting assembly.</p>
  
  <p>If seen that it should be possible with full .NET, but the documentation for msbuild and the new .csproj for .NET Core is a bit sparse at the moment.</p>