Question

Is there any way to make a property that is defined in a class compulsory?
I want the compiler to complain if the object is declared and used without the compulsory property.

Answer 1

A way might be to implement a constructor that forces the creation of an object to have an initial value for a property:

class Demo
{
    public int P {get; set;}

    Demo(int p)
    {
        P = p;
    }
}

Now the client can only create the object by passing a value for p:

var d = new Demo(42);