BitArray

 using System;

 using System.Collections;

 public class SamplesBitArray  {



    public static void Main()  {



       // Creates and initializes several BitArrays.

       BitArray myBA1 = new BitArray( 5 );



       BitArray myBA2 = new BitArray( 5, false );



       byte[] myBytes = new byte[5] { 1, 2, 3, 4, 5 };

       BitArray myBA3 = new BitArray( myBytes );



       bool[] myBools = new bool[5] { true, false, true, true, false };

       BitArray myBA4 = new BitArray( myBools );



       int[]  myInts  = new int[5] { 6, 7, 8, 9, 10 };

       BitArray myBA5 = new BitArray( myInts );



       // Displays the properties and values of the BitArrays.

       Console.WriteLine( "myBA1" );

       Console.WriteLine( "   Count:    {0}", myBA1.Count );

       Console.WriteLine( "   Length:   {0}", myBA1.Length );

       Console.WriteLine( "   Values:" );

       PrintValues( myBA1, 8 );



       Console.WriteLine( "myBA2" );

       Console.WriteLine( "   Count:    {0}", myBA2.Count );

       Console.WriteLine( "   Length:   {0}", myBA2.Length );

       Console.WriteLine( "   Values:" );

       PrintValues( myBA2, 8 );



       Console.WriteLine( "myBA3" );

       Console.WriteLine( "   Count:    {0}", myBA3.Count );

       Console.WriteLine( "   Length:   {0}", myBA3.Length );

       Console.WriteLine( "   Values:" );

       PrintValues( myBA3, 8 );



       Console.WriteLine( "myBA4" );

       Console.WriteLine( "   Count:    {0}", myBA4.Count );

       Console.WriteLine( "   Length:   {0}", myBA4.Length );

       Console.WriteLine( "   Values:" );

       PrintValues( myBA4, 8 );



       Console.WriteLine( "myBA5" );

       Console.WriteLine( "   Count:    {0}", myBA5.Count );

       Console.WriteLine( "   Length:   {0}", myBA5.Length );

       Console.WriteLine( "   Values:" );

       PrintValues( myBA5, 8 );

    }



    public static void PrintValues( IEnumerable myList, int myWidth )  {

       int i = myWidth;

       foreach ( Object obj in myList ) {

          if ( i <= 0 )  {

             i = myWidth;

             Console.WriteLine();

          }

          i--;

          Console.Write( "{0,8}", obj );

       }

       Console.WriteLine();

    }



 }





 /* 

 This code produces the following output.



 myBA1

    Count:    5

    Length:   5

    Values:

    False   False   False   False   False

 myBA2

    Count:    5

    Length:   5

    Values:

    False   False   False   False   False

 myBA3

    Count:    40

    Length:   40

    Values:

     True   False   False   False   False   False   False   False

    False    True   False   False   False   False   False   False

     True    True   False   False   False   False   False   False

    False   False    True   False   False   False   False   False

     True   False    True   False   False   False   False   False

 myBA4

    Count:    5

    Length:   5

    Values:

     True   False    True    True   False

 myBA5

    Count:    160

    Length:   160

    Values:

    False    True    True   False   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False   False   False   False   False   False

     True    True    True   False   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False    True   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False   False   False   False   False   False

     True   False   False    True   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False   False   False   False   False   False

    False    True   False    True   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False   False   False   False   False   False

    False   False   False   False   False   False   False   False

 */ 

一个int 是32 位的 ，i1byte 是 8位， int 是两个字节 ，4个byte