using System;
public class Program
{
public static void Main()
ITest a = new Test
Value1 = 1,
Value2 = 2
};
//Your code goes here
Console.WriteLine(a.Sum());
}
public interface ITest
int Value1 {get;}
int Value2 {get;}
int Sum()
return Value1 + Value2;
public class Test: ITest
public int Value1 {get; set;}
public int Value2 {get; set;}