C# 0 The Complete Reference

PART I

C h a p t e r   1 5 :  

D e l e g a t e s ,   E v e n t s ,   a n d   L a m b d a   E x p r e s s i o n s  

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PART IPART I

  }

}

The output is shown here. Pay special attention to the summation value.

0

1

2

3

Summation of 3 is 6

0

1

2

3

4

5

Summation of 5 is 21

As you can see, the count still proceeds normally. However, notice the summation value for 

5. It shows 21 instead of 15! The reason for this is that 

sum

 is captured by 

ctObj

 when it is 

created by the 

Counter( )

 method. This means it remains in existence until 

count

 is subject 

to garbage collection at the end of the program. Thus, its value is not destroyed when 

Counter( )

 returns or with each call to the anonymous method when