Memory placement in OS: NextFit

NextFit.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace NextFit
{
    class Algo
    {
        static int previousFit = 0;
        static void Main(string[] args)
        {
            // enter amount of memory gaps and value of memory gap into each array
            MGap[] mem = new MGap[4];
            mem[0] = new MGap(5);
            mem[1] = new MGap(15);
            mem[2] = new MGap(30);
            mem[3] = new MGap(10);
            while (true)
            {
                Console.WriteLine("Enter the amount of memory: ");
                int amount = int.Parse(Console.ReadLine());
                Find(amount, mem);
            }
        }

        static void Find(int mNeed, MGap[] mem)
        {
            if(previousFit==mem.Length-1)
                previousFit=0;
            for (int i = previousFit; i < mem.Length; i++)
            {
                if (mem[i].Size >= mNeed && mem[i].Available)
                {
                    mem[i].Available = false;
                    Console.WriteLine("Found empty size {0} space at {1} position, wasted memory: {2}", mem[i].Size, i, (mem[i].Size - mNeed));
                    previousFit = i;
                    break;
                }
            }
        }
    }

    class MGap
    {
        public bool Available { get; set; }
        public int Size { get; set; }

        public MGap(int size)
        {
            Size = size;
            Available = true;
        }
    }
}