Calling a method in its own class gives me errors c# VS code

Question

I was trying to figure out if I can call a method in its own class (I believe we can) so I created some very simple code:

public class CalMethod
{
    int x;
    int y;

    public int Calculator(int x, int y)
    {
        return x + y;
    }

    int result = Calculator(2,3);      
}

When I try to do int result= Calculator (2,3); I saw an error: a field initializer cannot reference the non-static field, method or property. Why this Calculator method needs to be static to be called in its own class? -yes I was trying to do a console app, but this class is not the main class from the program project.

And another thing that confuses me is that I was not able to find 'Calculator' from the list in its own class when typing 'Cal..', when the method is non-static. So I have to create a constructor of this class, and instantiating a new object to allow me to use a non-static method?

Please help. Thank you!

Answer 1

The call for int result = Calculator(2,3); should be inside a method, in C# any code should be inside a class method

public class CalMethod
    {
        int x;
        int y;

        public int Calculator(int x, int y)
        {
            return x + y;
        }

        public void TheClient()
        {
            int result = Calculator(2,3);  
        }    
    }