Limiting access to a public setter to specific objects (C#)

Question

I\'m trying to create a class (in C#) that serves as an environment for my application.

I\'m trying to make the class dynamic, and send it as a parameter to entities

Answer 1

How about

class Callee
{
    public void SetX(TypeOfCaller caller, int value)
    {
    }
}
class TypeOfCaller
{
    public void Do()
    {
        Callee instance;
        //..
        instance.SetX(this, 5);
    }
}

Doing so; you can also use Visual Studio' Find References feature! In case you want multiple types of caller; you can either opt for class hierarchy or can simply have required overloads