title: Build failed with Error MSB3073 exited with code 9009
body: <p>I run my visual studio project with the build script in cmd.
  It failed with the following error.
  Could anyone be able to guide me on what the error message trying to tell me.
  I'm thinking that i might have configured something wrong in my environment.</p>
  
  <p>Message</p>
  
  <pre><code>"C:\yyy\project.sln" (build target) (1) -&gt;
  "C:\yyy\project.csproj.metaproj" (default target) (2) -&gt;
  "C:\yyy\project.csproj" (default target) (36) -&gt;
  
  (PreBuildEvent target) -&gt;
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(902,9):
  error MSB3073: 
  The command "IF EXIST C:\yyy\subdomain\NUL del /S /F /Q C:\yyy\subdomain\*.*"
  exited with code 9009. [C:\yyy\project.csproj]
  </code></pre>