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// Use the generic List type to hold only people



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

// Use the generic List type to hold only people.

List
morePeople = new List


();

morePeople.Add(new Person());



// Use the generic List type to hold only cars.

List moreCars = new List();



// Compile-time error!

moreCars.Add(new Person());

}

Boxing Issues and Strongly Typed Collections

Strongly typed collections are found throughout the .NET base class libraries and are very useful

programming constructs. However, these custom containers do little to solve the issue of boxing

penalties. Even if you were to create a custom collection named IntCollection that was constructed

to operate only on System.Int32 data types, you would have to allocate some type of object to hold

the data (System.Array, System.Collections.ArrayList, etc.):

public class IntCollection : IEnumerable

{

private ArrayList arInts = new ArrayList();



public IntCollection() { }


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