.NET Windows应用商店应用和System.Type - 相当于运营商==？

Question

According to the accepted answer to this StackOverflow question, there is a difference between the System.Type.Equals method and the System.Type operator == :

a runtime type (represented by the internal type RuntimeType), managed by 
the CLR is not always the same as a Type, which can be extended. Equals 
will check the underlying system type, whereas == will check the type itself.

In .NET for Windows Store Apps , the System.Type operator == is not available.

How can I completely reproduce the functionality of the System.Type operator == in a Windows Store application ? Or, is the specific equality operator functionality for System.Type not relevant in Windows Store apps ?

Answer 1

So the underlying principle here is that Equals is a virtual instance method of every type, meaning it will use the vtable to determine the implementation to use, at runtime, based on the type of the actual object that called Equals (disregarding the type of the variable).

operator == can be thought of as a static method (with a lot of overloads). It is not virtual, so the implementation that is referred to will be based on the compile time type of the variable holding the object, and won't be based on what the actual type of the object is at runtime.

This behavior can be replicated by simply creating your own static Equals methods (on whatever type or types you prefer) that behave based on the types of the two arguments. This is slightly less convenient to type out than using operator == , but does effectively the same thing once compiled.