Restrict a method call to a specific page in a .net application (in C#)

Question

Hei, I have a method from a class in a custom library which I would like to restrict to be called only on a specific page, somehow using conditional methods. The problem is that I need a return value and conditional methods do not allow return other than void or 'out' parameters. Using a void method it works fine, but is there a way to accomplish this kind of conditional behavior and still return a value? Of course in the end I could manage like it is shown below, but I'm curious about other options.

My code now:

in the library:

public bool MyResult {get; private set;}

[Conditional("condition")]
public void MyConditionalMethod(...){
    this.MyResult = DoSomethingElse();
}

in the page:

#define condition
bla bla bla

Thanks!

Answer 1

Since the C# Spec, chapter 17, verse 4.2 explicitly says:

The conditional method must have a return type of void.

I guess it's not possible with C# in this universe.

Yet.