In the following example explains how to clear or empty an array in C# using Array.Clear() method.

using System;

namespace EmptyArray
{
    class Program
    {
        static void Main()
        {
            int[] arr = new int[] { 100, 200, 300, 400, 500 };
            Console.WriteLine("Array:");
            Console.WriteLine("------------------");

            foreach (var item in arr)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine("------------------");

            // Clear array values
            Array.Clear(arr, 0, arr.Length);

            Console.WriteLine("Array after clear:");
            Console.WriteLine("------------------");
            foreach (var item in arr)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine("------------------");
            Console.ReadKey();
        }
    }
}

Output:

Array:
------------------
100
200
300
400
500
------------------
Array after clear:
------------------
0
0
0
0
0
------------------