title: Could not copy. The process cannot access the file because it is being used by another process
body: <p>I am getting the following error when running my build on Visual Studio Online (using the built-in Build Controller):</p>
  
  <blockquote>
    <p>C:\Program Files
    (x86)\MSBuild\14.0\bin\amd64\Microsoft.Common.CurrentVersion.targets
    (3962): Could not copy
    "d:\a\src\MySolution\MyProject\Trunk\packages\Microsoft.Data.Edm.5.6.4\lib\net40\Microsoft.Data.Edm.xml"
    to "..\Build\bin\Release\Microsoft.Data.Edm.xml". Beginning retry 1 in
    1000ms. The process cannot access the file
    '..\Build\bin\Release\Microsoft.Data.Edm.xml' because it is being used
    by another process.</p>
  </blockquote>
  
  <p>It is never the same file either but it seems to always be either an xml or dll from the packages folder.</p>
  
  <p><strong>EDIT:</strong> I'm not sure if it is worth mentioning, but I do have multiple workspaces and multiple build definitions using this repository.</p>