double [,] hillheight={{3,2,3,4},{2,3,4,5},{3,4,5,6}};
Console.WriteLine("the rank of the hillheight:{0}", hillheight.Rank);
Console.WriteLine("the elements list:");
foreach (double hill in hillheight)
Console.WriteLine("{0}", hill);
Console.ReadKey();
.RANK到底是干什么的