System.Web.Mvc.ModelClientValidationRule 'exists in both cases an error

Question

System.Web.Mvc.ModelClientValidationRule 'exists in both cases an error

Possible duplicate:
MVC 4 Beta error side by side

I get this error

Error 1 Type "System.Web.Mvc.ModelClientValidationRule" exists in both: c: \ Program Files (x86) \ Microsoft ASP.NET \ ASP.NET Web Pages \ v2.0 \ Assemblies \ System.Web.WebPages.dll ' and 'c: \ Program Files (x86) \ Microsoft ASP.NET \ ASP.NET MVC 3 \ Assemblies \ System.Web.Mvc.dll'

After I changed Copy Localto false for some ASP.NET MVC3 libraries

How can I stop this error?

+5

.net visual-studio-2010 asp.net-mvc-3

Academy of programmer Jun 14 '12 at 13:33

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