static void Main(string[] args)
{
#region event handler
//Rectangle r = new Rectangle();
//r.Changed += new EventHandler(r_Changed);
//r.Length = 10;
//Rectangle rect = new Rectangle { Length = 10.0, Width = 20.0 };
//Console.WriteLine("Shape Name: {0}, Area: {1}", Rectangle.ShapeName, rect.GetArea());
#endregion
#region struct vs class - value type vs reference type
//Point p1 = new Point();
//p1.X = 10;
//p1.Y = 20;
//Point p2 = p1;
//p2.X = 100;
//Console.WriteLine("p1.X = {0}", p1.X);
//Rectangle rect1 = new Rectangle { Length = 10.0, Width = 20.0 };
//Rectangle rect2 = rect1;
//rect2.Length = 100.0;
//Console.WriteLine("rect1.Length = {0}", rect1.Length);
#endregion
#region inheritance
//Rectangle rect = new Rectangle(10, 20);
//Console.WriteLine("Width={0}, Length={1}, Area={2}", rect.Width, rect.Length, rect.GetArea());
#endregion
#region polymorphism
// Overrides keyword
//List<Polymorphism.Polygon> polygons = new List<Polymorphism.Polygon>();
//polygons.Add(new Polymorphism.Polygon());
//polygons.Add(new Polymorphism.Rectangle());
//polygons.Add(new Polymorphism.Triangle());
//foreach (Polymorphism.Polygon p in polygons)
//{
// p.Draw();
//}
//// New keyword
//Polymorphism.New.Triangle t = new Polymorphism.New.Triangle();
//t.Draw();
//Polymorphism.Polygon p = t;
//p.Draw();
#endregion
#region interfaces
Interfaces.Rectangle rect1 = new Interfaces.Rectangle
{
Length = 10, Width = 20
};
Interfaces.Rectangle rect2 = new Interfaces.Rectangle
{
Length = 100, Width = 200
};
Console.WriteLine(rect1.CompareTo(rect2));
#endregion
}
