Fix device emulator does not run ""Connection failed because of invalid command line arguments"."

I always get the following error:
"Connection failed because of invalid command line arguments".

Fix:
1. Try setting VS2010 to launch as Administrator: Make sure you are logged in as Administrator. Right click on Microsoft Visual Studio 2010 Express for Windows Phone, choose Properties, click on the Compatibility tab and turn on the check box for "Run this program as an Administrator". Relaunch Visual Studio (logged in as Administrator).
2. Here's another suggestion from a Microsoft developer who reported similar problems that he fixed on several occasions by following these steps:

1. Close the solution and then delete the solution .suo file and/or the project .user file.
2. Reopen and see if the deployment works.