C# 0 The Complete Reference

house

’s data is completely separate from the data contained in 

office

.

Figure 6-1 depicts this situation.

How Objects Are Created

In the preceding programs, the following line was used to declare an object of type 

Building

:

Building house = new Building();

This declaration performs three functions. First, it declares a variable called 

house

 of the 

class type 

Building

. This variable is not, itself, an object. Instead, it is simply a variable that 

can

refer to

 an object. Second, the declaration creates an actual, physical copy of the object. 

F

IGURE

 6-1 

One object’s 

instance variables 

are separate from 

another’s.

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PART I

C h a p t e r   6 :  

I n t r o d u c i n g   C l a s s e s   a n d   O b j e c t s  

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PART IPART I

This is done by using the 

new

 operator. Finally, it assigns to 

house

 a reference to that object. 

Thus, after the line executes, 

house

 refers to an object of type