02_02.cs

using System;

namespace _02_02{
class Class_02_02{
public static void main(String[] args){
bool x=true;
bool y=false;
Console.WriteLine("x={0}",x);
Console.WriteLine("y={0}",y);
x=!x;
y=!y;
Console.WriteLine("x={0}",x);
Console.WriteLine("y={0}",y);
}

}

}