Custom MSBuild task dlls locking.md

• Stack Overflow post (solution not working for all cases): https://stackoverflow.com/questions/13510465/the-mystery-of-stuck-inactive-msbuild-exe-processes-locked-stylecop-dll-nuget
• Process Monitor (to debug what locks files etc.): https://docs.microsoft.com/en-us/sysinternals/downloads/procmon
• A solution copying task DLL to temp destination before running the task: https://mnaoumov.wordpress.com/2015/07/13/msbuild-custom-task-and-assembly-locks/

Code listing from blog post:

<PropertyGroup>
  <TempFolder>$([System.IO.Path]::GetTempPath())$([System.Guid]::NewGuid())</TempFolder>
</PropertyGroup>
<Target
  Name="CopyTaskAssemblyToTempFolder"
  BeforeTargets="BeforeBuild">
  <Copy
    SourceFiles="$(MSBuildThisFileDirectory)MyCoolAssembly.dll"
    DestinationFolder="$(TempFolder)"
  />
</Target>
<UsingTask
  TaskName="MyCoolAssembly.MyCoolTask"
  AssemblyFile="$(TempFolder)\MyCoolAssembly.dll"
/>
<Target
  Name="MyCoolTarget">
  <MyCoolTask />
</Target>

Could use Path.GetRandomFileName() instead of NewGuid for a shorter path