title: How to get version number in post-build event
body: <p>I want to use post-build event to automatically create a nuget package and then copy it to a shared folder on our network, something like this (the version number 1.0.0.0. is specified inside the MyLib.nuspec file):</p>
  
  <pre><code>nuget.exe pack "$(SolutionDir)MyLib.nuspec"
  xcopy /Y "$(TargetDir)MyLib.1.0.0.0.nupkg" \\folder\subfolder\NuGetPackages
  </code></pre>
  
  <p>This works, but now I would like to update this script, so that it would include the assembly version also, but I cannot get assembly version inside the post-build event. I would need something like this:</p>
  
  <pre><code>nuget.exe pack -Version $(AssemblyVersion) "$(SolutionDir)MyLib.nuspec"
  xcopy /Y "$(TargetDir)MyLib." + $(AssemblyVersion) + ".nupkg" \\folder\subfolder\NuGetPackages
  </code></pre>
  
  <p>But the $(AssemblyVersion) variable does not exists... Any ideas?</p>