Can't seem to override CreateController in the DefaultControllerFactory

I'm trying to implement Elmah into my MVC application using this great tutorial.

http://dotnetdarren.wordpress.com/20开发者_C百科10/07/27/logging-on-mvc-part-1/

Everything seems fine, but when I build, I get

no suitable method found to override

Below is the class I took right from the sample

public class ErrorHandlingControllerFactory : DefaultControllerFactory
    {
        /// <summary>
        /// Injects a custom attribute 
        /// on every action that is invoked by the controller
        /// </summary>
        /// <param name="requestContext">The request context</param>
        /// <param name="controllerName">The name of the controller</param>
        /// <returns>An instance of a controller</returns>
        public override IController CreateController(
            RequestContext requestContext,
            string controllerName)
        {
            var controller =
                base.CreateController(requestContext,
                controllerName);

            var c = controller as Controller;

            if (c != null)
            {
                c.ActionInvoker =
                    new ErrorHandlingActionInvoker(
                        new HandleErrorWithELMAHAttribute());
            }

            return controller;
        }
    }

Well, after much more research, I found the issue from this link

http://forums.asp.net/t/1622810.aspx

Needed to add a reference to System.Web.Routing since it was in a seperate project.

I was able to build successfully:

1. Created a new Empty ASP.NET MVC 2 project
2. From the tutorial, copied in the code for the HandleErrorWithELMAHAttribute class.
3. Copied the code for the ErrorHandlingActionInvoker class.
4. Copied the code for the ErrorHandlingControllerFactory class.
5. Added necessary using statements and a reference to ELMAH.

Then, to check, I replaced the original code for the ErrorHandlingControllerFactory with the code from your question, and it also compiled without error.

I was able to get that error was by adding a class named DefaultControllerFactory so that ErrorHandlingControllerFactory would be inheriting from that. It seems unlikely, but you may want to make sure you are inheriting from the correct class.