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// Make a Rectangle.

Rectangle r = new Rectangle(15, 4);

Console.WriteLine(r.ToString());

r.Draw();

Console.WriteLine();

// Convert r into a Square,

// based on the height of the Rectangle.

Square s = (Square)r;

Console.WriteLine(s.ToString());

s.Draw();

Console.ReadLine();

}

The output can be seen in Figure 12-5.

Figure 12-5.

Converting a Rectangle structure to a Square structure

While it may not be all that helpful to convert a Rectangle into a Square within the same scope,

assume you have a function that has been designed to take Square parameters.

// This method requires a Square type.

static void DrawSquare(Square sq)

{

Console.WriteLine(sq.ToString());

sq.Draw();

}

Using your explicit conversion operation on the Square type, you can now pass in Rectangle

types for processing using an explicit cast:

static void Main(string[] args)

{

...