reactive/Rx.NET/Source/packages/Microsoft.Bcl.Build.1.0.4/tools/Uninstall.ps1

param($installPath, $toolsPath, $package, $project)
 
  # Need to load MSBuild assembly if it's not loaded yet.
  Add-Type -AssemblyName 'Microsoft.Build, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'

  # Grab the loaded MSBuild project for the project
  $msbuild = [Microsoft.Build.Evaluation.ProjectCollection]::GlobalProjectCollection.GetLoadedProjects($project.FullName) | Select-Object -First 1
  $importToRemove = $msbuild.Xml.Imports | Where-Object { $_.Project.Endswith($package.Id + '.targets') }

  # Add the import and save the project
  $msbuild.Xml.RemoveChild($importToRemove) | out-null
  $project.Save()