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// Rectangles can be explicitly converted

// into Squares.

public static explicit operator Square(Rectangle r)

{

Square s;

s.Length = r.Height;

return s;

}

}

Notice that this iteration of the Square type defines an explicit conversion operator. Like the

process of overloading an operator, conversion routines make use of the C# operator keyword (in

conjunction with the explicit or implicit keyword) and must be defined as static. The incoming

parameter is the entity you are converting 

from, while the operator type is the entity you are

converting 

to.

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In this case, the assumption is that a square (being a geometric pattern in which all sides are

of equal length) can be obtained from the height of a rectangle. Thus, you are free to convert a

Rectangle into a Square as follows:

static void Main(string[] args)

{

Console.WriteLine("***** Fun with Conversions *****\n");