Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

external/corefx/run.cmd

@@ -0,0 +1,27 @@
+@if not defined _echo @echo off
+setlocal
+
+if not defined VisualStudioVersion (
+  if defined VS140COMNTOOLS (
+    call "%VS140COMNTOOLS%\VsDevCmd.bat"
+    goto :Run
+  )
+  echo Error: Visual Studio 2015 required.
+  echo        Please see https://github.com/dotnet/corefx/blob/master/Documentation/project-docs/developer-guide.md for build instructions.
+  exit /b 1
+)
+
+:Run
+:: Clear the 'Platform' env variable for this session, as it's a per-project setting within the build, and
+:: misleading value (such as 'MCD' in HP PCs) may lead to build breakage (issue: #69).
+set Platform=
+
+:: Restore the Tools directory
+call %~dp0init-tools.cmd
+if NOT [%ERRORLEVEL%]==[0] exit /b 1
+
+set _toolRuntime=%~dp0Tools
+set _dotnet=%_toolRuntime%\dotnetcli\dotnet.exe
+
+call %_dotnet% %_toolRuntime%\run.exe %*
+exit /b %ERRORLEVEL%