Solution Review: Implement an Interface

// Addition interface
interface IAddition {
  int AddTwo(int num1, int num2);
}
// Calculator Class Implementing the Addition Interface
class Calculator : IAddition {
  
  // Overriding the add method of Addition interface
  public int AddTwo(int num1, int num2) {
    return num1 + num2;
  }
  
}
class Demo {
  
 public static void Main(string[] args) {
   Calculator cal = new Calculator();
   Console.WriteLine(cal.AddTwo(10, 20));
 }
  
}