anchor.diff:  if /i "%1" == "skiptestbuild" (set __SkipTestBuild=1&shift&goto Arg_Loop)
   if /i "%1" == "docrossgen" (set __DoCrossgen=1&shift&goto Arg_Loop)
   
  +if /i "%1" == "/toolset_dir" (set __ToolsetDir=%2&shift&shift&goto Arg_Loop)
  +
   echo Invalid commandline argument: %1
   goto Usage
   
  
positive.code: echo Usage:
  echo %0 BuildArch BuildType [clean] [vsversion] where:
  echo.
  echo BuildArch can be: x64, x86
  echo BuildType can be: Debug, Release
  echo Clean - optional argument to force a clean build.
  echo VSVersion - optional argument to use VS2013 or VS2015 (default VS2015)
  
negative.code: echo linuxmscorlib - Build mscorlib for Linux
  echo osxmscorlib - Build mscorlib for OS X
  echo skiptestbuild - Skip building tests
  echo toolset_dir - toolset directory -- Arm64 use only.
  exit /b 1
  