Why must I define a commutative operator twice?

Question

I wonder if I must define a commutative operator (like *) twice!

public static MyClass operator *(int i, MyClass m)
{
    return new MyClass(i *         


        

Answer 1

class MyClass {
    private int i;
    public MyClass(int x)  {
        i=x;
    }
    public static MyClass  operator+(MyClass a , MyClass  b)  {
        return new MyClass(a.i+b.i);
    }
    public static implicit operator MyClass(int  a) {
        return new MyClass(a);
    }

    static void Main(string[] args) {
        MyClass a , b ,c ;
        a=new MyClass(2);
        b=a+4;
        c=4+a;
        Console.WriteLine("B = {0}, C = {1}",b,c);

    }

There you go, all you have to do is have the compiler turn int into MyClass instance and then use the MyClass + MyClass method.