static void Main(string[] args)
{
yyy a = new yyy(); ;
int i; // u can try giving int i=100 but is useless as that value is not passed into the method. Only variable goes into the method and gets changed its value and comes out.
a.abc(out i);
System.Console.WriteLine(i);
}
static void Main(string[] args)
{
yyy a = new yyy();;
int i = 0;
a.abc(ref i);
System.Console.WriteLine(i);
}
public static void Main()
{
yyy a;
int i = 10;
a = new yyy();
a.abc(ref i);
System.Console.WriteLine(i);
}