title: Visual Studio 2012 failing to detect Visual Studio 2008 build tools
body: <p>I am trying to use Visual Studio 2012 to build a C++ CLI application targeting .NET 3.5.</p>
  
  <p>I've already gotten this working on one machine, by installing Visual Studio 2008, and specifying the v90 platform toolset.</p>
  
  <p>Now I am attempting this on a new machine, and I've installed Visual Studio 2008, then Visual Studio 2012.</p>
  
  <p>Now I get this incredibly frustrating error:</p>
  
  <blockquote>
    <p>Error 81  error MSB8020: The builds tools for Visual Studio 2008
    (Platform Toolset = 'v90') cannot be found. To build using the v90
    build tools, either click the Project menu or right-click the
    solution, and then select "Update VC++ Projects...". Install Visual
    Studio 2008 to build using the Visual Studio 2008 build
    tools.    C:\Program Files
    (x86)\MSBuild\Microsoft.Cpp\v4.0\V110\Microsoft.Cpp.Platform.targets  43  5   WinApiWrapper
    (Visual Studio 2008)</p>
  </blockquote>
  
  <p>Why WOULDN'T Visual Studio 2012 be able to find Visual Studio 2008. Is there any way I can help it?</p>