dir.targets

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="12.0" InitialTargets="CheckForBuildTools" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

  <Target Name="CheckForBuildTools">
    <Error Condition="!Exists('$(ToolsDir)') and '$(OverrideToolsDir)'=='true'"
           Text="The tools directory [$(ToolsDir)] does not exist. Please run sync in your enlistment to ensure the tools are installed before attempting to build an individual project." />
    <Error Condition="!Exists('$(ToolsDir)') and '$(OverrideToolsDir)'!='true'"
           Text="The tools directory [$(ToolsDir)] does not exist. Please run init-tools.cmd in your enlistment to ensure the tools are installed before attempting to build an individual project." />
  </Target>

  <Import Project="$(ToolsDir)/Build.Common.targets" Condition="Exists('$(ToolsDir)/Build.Common.targets')" />
</Project>