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ArrayList.Sort（）解析
ArrayList的sort函数有几种比较常用的重载：
1.不带参数
2.带一个参数
public virtual void Sort( IComparer comparer)
参数
- comparer
- 类型：System.Collections.IComparer 比较元素时要使用的 IComparer 实现。 - 或 - null 引用（Visual Basic 中为 Nothing）将使用每个元数的 IComparable 实现。
- example:
using System;using System.Collections;public class SamplesArrayList { public class myReverserClass : IComparer { // Calls CaseInsensitiveComparer.Compare with the parameters reversed. int IComparer.Compare( Object x, Object y ) { return( (new CaseInsensitiveComparer()).Compare( y, x ) ); } } public static void Main() { // Creates and initializes a new ArrayList. ArrayList myAL = new ArrayList(); myAL.Add( "The" ); myAL.Add( "quick" ); myAL.Add( "brown" ); myAL.Add( "fox" ); myAL.Add( "jumps" ); myAL.Add( "over" ); myAL.Add( "the" ); myAL.Add( "lazy" ); myAL.Add( "dog" ); // Displays the values of the ArrayList. Console.WriteLine( "The ArrayList initially contains the following values:" ); PrintIndexAndValues( myAL ); // Sorts the values of the ArrayList using the default comparer. myAL.Sort(); Console.WriteLine( "After sorting with the default comparer:" ); PrintIndexAndValues( myAL ); // Sorts the values of the ArrayList using the reverse case-insensitive comparer. IComparer myComparer = new myReverserClass(); myAL.Sort( myComparer ); Console.WriteLine( "After sorting with the reverse case-insensitive comparer:" ); PrintIndexAndValues( myAL ); } public static void PrintIndexAndValues( IEnumerable myList ) { int i = 0; foreach ( Object obj in myList ) Console.WriteLine( "\t[{0}]:\t{1}", i++, obj ); Console.WriteLine(); }}/* This code produces the following output.The ArrayList initially contains the following values: [0]: The [1]: quick [2]: brown [3]: fox [4]: jumps [5]: over [6]: the [7]: lazy [8]: dogAfter sorting with the default comparer: [0]: brown [1]: dog [2]: fox [3]: jumps [4]: lazy [5]: over [6]: quick [7]: the [8]: TheAfter sorting with the reverse case-insensitive comparer: [0]: the [1]: The [2]: quick [3]: over [4]: lazy [5]: jumps [6]: fox [7]: dog [8]: brown */ArrayList.Sort（）解析
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