When you a method, you write multiple methods with a shared name but different parameter lists?

When you overload a method, you write multiple methods with a shared name with different parameter list.
example c#
 int AddNumbers(int a, int b){
    return a+b;
};

int AddNumbers(double a, double a){
  return Convert.ToInt32(a+b);
}

Ithink it would be c (a word object) not 100% sure though