C# Arraylist的sort函数的用法

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]:    dog

After sorting with the default comparer:
[0]:    brown
[1]:    dog
[2]:    fox
[3]:    jumps
[4]:    lazy
[5]:    over
[6]:    quick
[7]:    the
[8]:    The

After 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
*/