strange runtime error ASP.NET MVC
<pre><code>Method not found: 
'Void 
Microsoft.Web.Infrastructure.DynamicValidationHelper.ValidationUtility.Get
UnvalidatedCollections(System.Web.HttpContext, System.Collections.Specialized.
NameValueCollection ByRef, System.Collections.Specialized.NameValueCollection 
ByRef, System.Collections.Specialized.NameValueCollection ByRef, 
System.Web.HttpCookieCollectionByRef)'.
</code></pre>

<p>It maybe caused by installing MVC 4 beta, I'd uninstall it, how can I solve this problem?</p>
