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[book] [en] Pro C# 2008 and the NET 3.5 Platform Fourth Edition

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243

8849CH07.qxd  10/1/07  10:38 AM  Page 243




8849CH07.qxd  10/1/07  10:38 AM  Page 244


Understanding Object Lifetime

A

t this point in the text, you have learned a great deal about how to build custom class types using

C#. Here, you will come to understand how the CLR is managing allocated objects via garbage col-

lection. C# programmers never directly deallocate a managed object from memory (recall there is

no delete keyword in the C# language). Rather, .NET objects are allocated onto a region of memory

termed the 

managed heap, where they will be automatically destroyed by the garbage collector

“sometime in the future.”

Once you have examined the core details of the collection process, you will learn how to pro-

grammatically interact with the garbage collector using the System.GC class type. Next you examine

how the virtual System.Object.Finalize() method and IDisposable interface can be used to build

types that release internal 



unmanaged resources in a timely manner. By the time you have com-

pleted this chapter, you will have a solid understanding of how .NET objects are managed by

the CLR.


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