C# Array LongLength

[ComVisibleAttribute(false)]
public long LongLength { get; }

using System;/*from   w ww . j a  v  a  2  s.c  o  m*/

public class MainClass
{
   public static void Main(){
      String[] array1d = { "zero", "one", "two", "three" };
      ShowArrayInfo(array1d);

      String[,] array2d= { { "zero", "0" }, { "one", "1" }, 
                           { "two", "2" }, { "three", "3"},
                           { "four", "4" }, { "five", "5" } };
      ShowArrayInfo(array2d);                             
   }

   private static void ShowArrayInfo(Array arr)
   {
      Console.WriteLine("Length of Array:      {0,3}", arr.LongLength);
      Console.WriteLine("Number of Dimensions: {0,3}", arr.Rank);

      if (arr.Rank > 1) {
         for (int dimension = 1; dimension <= arr.Rank; dimension++)
            Console.WriteLine("   Dimension {0}: {1,3}", dimension, 
                              arr.GetUpperBound(dimension - 1) + 1);
      }
      Console.WriteLine();
   }
}