I guess that's a real noobie question, but I'm new to OO and .Net. I just don't understand why it can't be done.
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That's an easy one. The keyword 'this' returns a reference to the current instance of the class containing it. Static methods (or any static member) do not belong to a particular instance. They exist without creating an instance of the class. There is a much more in depth explanation of what static members are and why/when to use them in the MSDN docs.
From Kilhoffer -
Static methods are Class specific and not instance specific. "this" represents an instance of the class at runtime, so this can't be used in a static context because it won't be referencing any instance. Instead the class's name should be used and you would only be able to access static members in the class
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this represents the current instance object and there is no instance with static methods.
From CSharpAtl -
As an additional note, from a Static method, you can access or static members of that class. Making the example below valid and at times quite useful.
public static void StaticMethod(Object o) { MyClass.StaticProperty = o; }
From Timothy Carter -
there is no this there
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