c# Rank属性与GetUpperBound方法的深入分析

array的rank 属性：
   语法：public int rank { get; }   得到array的秩（维数）。
array而getupperbound 方法：
   语法：public int getupperbound(int dimension)  用于获取 array 的指定维度的上限。
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示例：

using system;
 public class samplesarray  {
    public static void main()  {
       // creates a new one-dimensional array of type int32.
       array my1dintarray = array.createinstance( typeof(int32), 5 );
       // uses getlowerbound and getupperbound in the for loop.
       for ( int i = my1dintarray.getlowerbound(0); i <= my1dintarray.getupperbound(0); i++ )
          my1dintarray.setvalue( i+1, i );
       // displays the bounds and values of the one-dimensional array.
       console.writeline( "one-dimensional array:" );
       console.writeline( "rank/tlower/tupper" );
       console.writeline( "{0}/t{1}/t{2}", 0, my1dintarray.getlowerbound(0), my1dintarray.getupperbound(0) );
       console.writeline( "values:" );
       printvalues( my1dintarray );
       console.writeline();
       // creates a new three-dimensional array of type int32.
       array my3dintarray = array.createinstance( typeof(int32), 2, 3, 4 );
       // uses getlowerbound and getupperbound in the for loop.
       for ( int i = my3dintarray.getlowerbound(0); i <= my3dintarray.getupperbound(0); i++ )
          for ( int j = my3dintarray.getlowerbound(1); j <= my3dintarray.getupperbound(1); j++ )
             for ( int k = my3dintarray.getlowerbound(2); k <= my3dintarray.getupperbound(2); k++ )  {
                my3dintarray.setvalue( (i*100)+(j*10)+k, i, j, k );
             }
       // displays the bounds and values of the multidimensional array.
       console.writeline( "multidimensional array:" );
       console.writeline( "rank/tlower/tupper" );
       for ( int i = 0; i < my3dintarray.rank; i++ )
          console.writeline( "{0}/t{1}/t{2}", i, my3dintarray.getlowerbound(i), my3dintarray.getupperbound(i) );
       console.writeline( "values:" );
       printvalues( my3dintarray );
    }
    public static void printvalues( array myarr )  {
       system.collections.ienumerator myenumerator = myarr.getenumerator();
       int i = 0;
       int cols = myarr.getlength( myarr.rank - 1 );
       while ( myenumerator.movenext() )  {
          if ( i < cols )  {
             i++;
          } else  {
             console.writeline();
             i = 1;
          }
          console.write( "/t{0}", myenumerator.current );
       }
       console.writeline();
    }
 }
 /*
 this code produces the following output.
 one-dimensional array:
 rank    lower    upper
 0    0    4
 values:
     1    2    3    4    5
 multidimensional array:
 rank    lower    upper
 0    0    1
 1    0    2
 2    0    3
 values:
     0    1    2    3
     10    11    12    13
     20    21    22    23
     100    101    102    103
     110    111    112    113
     120    121    122    123
*/