private static void ValPMethod1()
{
var a = new ValPoint();
Console.WriteLine($"ValPMethod1 - start: x = {a.X}, y = {a.Y}");
ValPMethod2(a);
Console.WriteLine($"ValPMethod1 - end: x = {a.X}, y = {a.Y}");
}
private static void ValPMethod2(ValPoint a)
{
Console.WriteLine($"ValPMethod2 - start: x = {a.X}, y = {a.Y}");
a = new ValPoint(1, a.Y);
Console.WriteLine($"ValPMethod2 - end: x = {a.X}, y = {a.Y}");
}