using System;
using System.Collections.Generic;
using System.Linq;
public class Program
{
public static void Main()
var a = new A();
a.SetA = 123;
Console.WriteLine(a.GetA);
}
public class A
private int _a;
public int GetA { get { return _a;} private set { _a = value; }}
public int SetA { private get { return _a;} set { _a = value; }}