.NET MVC Ambiguous Type Reference

Question

Not entirely sure what's going on here; any help would be appreciated.

I'm trying to create a new .NET MVC web app. I was pretty sure I had it set up correctly, but I'm getting the following error:

The type 'System.Web.Mvc.ViewPage' is ambiguous: it could come from assembly 
'C:\MyProject\bin\System.Web.Mvc.DLL' or from assembly 
'C:\MyProject\bin\MyProject.DLL'. Please specify the assembly explicitly in the type name.

The source error it reports is as follows:

Line 1:  <%@ Page Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage" %>
Line 2:  
Line 3:  <asp:Content ID="indexContent" ContentPlaceHolderID="MainContentPlaceHolder" runat="server">

Anything stand out that I'm doing completely wrong?

Answer 1

I suppose you named one of your page "ViewPage" is that the case?

And like @Jonathan mentioned, this smells:

Inherits="System.Web.Mvc.ViewPage"

On my MVC application, all the view pages have this instead:

Inherits="MySite.Views.Pages.Home"

Or something along the line. Your aspx page markup should have "Inherits" point to your code-behind class name, not the actual class that it is inheriting. The attribute name is rather misleading but its an artifact of earlier days.