1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 7 namespace jj4 8 { 9 public class OpertionAdd:Operation 10 { 11 public override double GetResult() 12 { 13 double result = NumberA + NumberB; 14 return result; 15 } 16 } 17 }