Build Errors - 'System.Web.Mvc.ModelClientValidationRule' Conflicts

Question

I am trying to \'build\' my MVC3 web app in VS2010 however keep getting the following error:

Error 2 The type \'System.Web.Mvc.ModelClientValidationRule\' exists

Answer 1

The best way to avoid this conflict is-

1. Go to solution explorer
2. Reference
3. Right click on System.Web.WebPages
4. Remove

Now run your application and Enjoy !