I've been experiencing problems with ReSharper lately in regards to ASP.NET development with master pages. When a ContentPage is assigned a MasterPageFile, and defines a <%@ MasterType VirtualPath %>, ReSharper completely stops functioning properly. Intellisense on the code-behind is broken. More-over, the frontend aspx can't seem to "find" the Inherits="" class.
ReSharper keeps suggesting the proper code-behind class, even though it's already set.
As soon as I remove the MasterType declaration, everything works nicely again.