using System;
using System.Diagnostics;

namespace ConsoleApplication97 {
    class Program {
        static void Main(string[] args) {
            FirstClass firstClass = new FirstClass(100);
            SecondClass secondClass = new SecondClass(100);
            ThirdClass thirdClass = new ThirdClass(100);
            Console.WriteLine(GetPropertyValue(firstClass));
            Console.WriteLine(DoForInterface(firstClass));
            Console.WriteLine(DoForInterface(secondClass));
            Console.WriteLine(DoForInterface(thirdClass));
        }

        static int DoForInterface(IInterface iInterface) {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            int sum = 0;
            for (int i = 0; i < 100; i++) {
                sum += GetPropertyValue(iInterface);
            }
            sw.Stop();
            Console.WriteLine($"Ticks: {sw.Elapsed.Ticks.ToString()}");
            return sum;
        }

        static int GetPropertyValue(IInterface iInterface) {
            return iInterface.InterfaceProperty;
        }
    }

    public interface IInterface {
        int InterfaceProperty { get; }
    }

    public class FirstClass : IInterface {
        public FirstClass(int param) {
            InterfaceProperty = param;
        }

        public int InterfaceProperty { get; set; }
    }

    public class SecondClass : IInterface {
        public SecondClass(int param) {
            InterfaceProperty = param;
        }

        public int InterfaceProperty { get; set; }
    }

    public class ThirdClass : IInterface {
        public ThirdClass(int param) {
            InterfaceProperty = param;
        }

        public int InterfaceProperty { get; set; }
    }
}