C# 0 The Complete Reference

Width

 and 

Height

 associated with the invoking object will be 

multiplied together and the result returned. However, the same statement can also be 

written like this:

return this.Width * this.Height;

Here, 

this

 refers to the object on which 

Area( )

 was called. Thus, 

this.Width

 refers to that 

object’s copy of 

Width

, and 

this.Height

 refers to that object’s copy of 

Height

. For example, 

if

Area( )

 had been invoked on an object called 

x

, then 

this

 in the preceding statement 

would have been referring to 

x

. Writing the statement without using 

this

 is really just 

shorthand.

It is also possible to use 

this

 inside a constructor. In this case, 

this

 refers to the object 

that is being constructed. For example, inside 

Rect( )

, the statements

Width = w;

Height = h;

can be written like this:

this.Width = w;

this.Height = h;

Of course, there is no benefit in doing so in this case.

For the sake of illustration, here is the entire 

Rect

 class written using the 

this

 reference:

using System;

class Rect {

  public int Width;

  public int Height;

  public Rect(int w, int h) {

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