title: How do I make a Visual Studio 2015 C++ project compatible with Visual Studio 2010?
body: <p>My teacher is horsed to use Visual&nbsp;Studio&nbsp;2010 by the school, because they don't want to bother installing anything new. I've been using Visual&nbsp;Studio&nbsp;2015 and am really liking it. However, when she tries to run any of the code, it produces a bunch of errors. I tried a solution for making 2013/2012 projects compatible with 2010 by editing the solution file, but it still produces errors. Is there a solution?</p>
  
  <p>Here is the console output when I try to run the source file in Visual&nbsp;Studio&nbsp;2010:</p>
  
  <pre><code>1&gt;------ Build started: Project: typingSalon, Configuration: Debug Win32 ------
  1&gt;Build started 4/8/2015 8:19:30 AM.
  1&gt;Project file contains ToolsVersion="14.0". This toolset is unknown or missing. You may be able to resolve this by installing the appropriate .NET Framework for this toolset. Treating the project as if it had ToolsVersion="4.0".
  1&gt;C:\Program Files\MSBuild\Microsoft.Cpp\v4.0\Platforms\Win32\Microsoft.Cpp.Win32.Targets(518,5): error MSB8008: Specified platform toolset (v140) is not installed or invalid. Please make sure that a supported PlatformToolset value is selected.
  1&gt;
  1&gt;Build FAILED.
  1&gt;
  1&gt;Time Elapsed 00:00:00.05
  ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
  </code></pre>