static void Main(string[] args)
{
Figure rnct1 = new Rectangle();
Point [] cont = new Point[4];
cont[0] = new Point(1, 1, 1,"A");
cont[1] = new Point(2, 2, 2, "B");
cont[2] = new Point(3, 3, 3, "C");
cont[3] = new Point(4, 4, 4, "D");
rnct1.InsertInfo(cont);
Console.WriteLine(rnct1); // display info
rnct1.WriteToFile("rectangle.txt"); // print to file
Console.WriteLine("----------");
IControls btn = Button.InstanceCreation();
btn.Click();
Console.WriteLine(btn); // check overriden method
// --------------------------
Console.WriteLine("*************");
var pnt1 = new Point(1, 1, 1);
var pnt2 = new Point(2, 2, 2);
Console.WriteLine(pnt1);
Console.WriteLine(pnt2);
var pnt3 = new Point();
pnt3 = pnt1 + pnt2;
Console.WriteLine("Point 1 + Point 2: {0}" , pnt3);
pnt3 = pnt1 - pnt2;
Console.WriteLine("Point 1 - Point 2: {0}", pnt3);
pnt3 = pnt1 * pnt2;
Console.WriteLine("Point 1 * Point 2: {0}", pnt3);
Console.WriteLine("Point 1 = Point 2? {0}", pnt1 == pnt2);
Console.ReadKey();
}