Initial data commit

Task/Polymorphism/C-sharp/polymorphism.cs

@@ -0,0 +1,32 @@
+using System;
+class Point
+{
+  protected int x, y;
+  public Point() : this(0) {}
+  public Point(int x) : this(x,0) {}
+  public Point(int x, int y) { this.x = x; this.y = y; }
+  public int X { get { return x; } set { x = value; } }
+  public int Y { get { return y; } set { y = value; } }
+  public virtual void print() { System.Console.WriteLine("Point"); }
+}
+
+public class Circle : Point
+{
+  private int r;
+  public Circle(Point p) : this(p,0) { }
+  public Circle(Point p, int r) : base(p) { this.r = r; }
+  public Circle() : this(0) { }
+  public Circle(int x) : this(x,0) { }
+  public Circle(int x, int y) : this(x,y,0) { }
+  public Circle(int x, int y, int r) : base(x,y) { this.r = r; }
+  public int R { get { return r; } set { r = value; } }
+  public override void print() { System.Console.WriteLine("Circle"); }
+
+  public static void main(String args[])
+  {
+    Point p = new Point();
+    Point c = new Circle();
+    p.print();
+    c.print();
+  }
+}