C# 0 The Complete Reference

Enabling the Short-Circuit Operators

To enable the use of the 

&&

 and 

||

 short-circuit operators, you must follow four rules. 

First, the class must overload 

&

 and 

|

. Second, the return type of the overloaded 

&

 and 

|

methods must be the same as the class for which the operators are being overloaded. Third, 

each parameter must be a reference to an object of the class for which the operator is being 

overloaded. Fourth, the 

true

 and 

false

 operators must be overloaded for the class. When 

these conditions have been met, the short-circuit operators automatically become available 

for use.

The following program shows how to properly implement the 

&

 and