public void Equal()
{
double x = 1.1, y = 2.2;
var p1 = new RoixPoint(x, y);
var p2 = new RoixPoint(x, y);
p1.Equals(p2).IsTrue();
(p1 == p2).IsTrue();
(p1 != p2).IsFalse();
var obj2 = (object)p2;
p1.Equals(obj2).IsTrue();
}
