What is the point of this code?
asp.net-mvc-3, implementation, interface
Solution
This code makes it possible for you to override the Execute method.
Remember that a normally implemented interface method is public (and not virtual or abstract), so you can't override it in derived classes and creating a new Execute method wouldn't be accessible through the `IController` interface by default (without this interface to protected virtual technique). By creating a protected virtual method (which you call from the explicitly implemented interface method) allows derived classes to override the Execute method without breaking the interface implementation.
I found an excellent article about this here: C# Overriding Interface Methods in Subclasses
Problem
I'm reading through the source code for ASP.NET MVC3, and I came across the following inside of the code for ControllerBase: ``` public interface IController { void Excecute(RequestContext requestContext); } public abstract class ControllerBase : IController { protected virtual void Execute(RequestContext requestContext) { if (requestContext == null) { throw new ArgumentNullException("requestContext"); } if (requestContext.HttpContext == null) { throw new ArgumentException(MvcResources.ControllerBase_CannotExecuteWithNullHttpContext, "requestContext"); } VerifyExecuteCalledOnce(); Initialize(requestContext); using (ScopeStorage.CreateTransientScope()) { ExecuteCore(); } } void IController.Execute(RequestContext requestContext) { Execute(requestContext); } } ``` ControllerBase provides an implementation of `Execute`, but then it has something that provides a definition for.. `IController.Execute`? Why is this done, and what does it achieve? It seems like it serves no purpose.