int [] Array = {1,2,3,4,5};
 int number = Array.Length;        // 5

 int number = Array.Rank;           // 1

string[] name = new string []{"xiao","zhao","li"};
    Array.Sort(name);
    foreach(string s in name)
    {
        Console.WriteLine(s);
    }
 

 Array.Reverse(name);

 int[,,] number = new int[4,3,2]{
                                                    {{1,2},{3,4},{5,6}},
                                                    {{1,2},{3,4},{5,6}},
                                                    {{1,2},{3,4},{5,6}},
                                                    {{1,2},{3,4},{5,6}}
                                                    };
    for(int i=number.GetLowerBound(0);i<=number.GetUpperBound(0);i++){
        for(int j=number.GetLowerBound(1);j<=number.GetUpperBound(1);j++){
            for(int k=number.GetLowerBound(2);k<=number.GetUpperBound(2);k++){
            }
        }
    }