Length and Rank

        public int  GetLength  (int dimension);
        public long GetLongLength  (int dimension);
        
        public int  Length  { get; }
        public long LongLength  { get; }
        
        public int GetLowerBound (int dimension);
        public int GetUpperBound (int dimension);
        
        public int Rank { get; }  // Returns number of dimensions in array

using System;
using System.Collections;

class Sample
{
    public static void Main()
    {
        // Create a string array 2 elements in length:
        Array a = Array.CreateInstance(typeof(string), 2);

        a.SetValue("hi", 0);
        a.SetValue("there", 1);
        string s = (string)a.GetValue(0);

        Console.WriteLine(a.Length);
    }
}