Задача 2.4.1.3 (npc)

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

namespace _2._4._1._3npc
{
    class Program
    {
        static Random R;


        static void Main(string[] args)
        {
            R = new Random();
            NPCGenerator generator = new NPCGenerator();

            List<NPC> AllNPC = new List<NPC>();

            int NPCCount = R.Next(3, 10);
            for(int i=1; i<=NPCCount;i++)
            {
                NPC newNPC = generator.CreateNPC();
                AllNPC.Add(newNPC);
            }

            Console.CursorVisible = false;

            while (true)
            {
                Console.Clear();
                foreach(NPC n in AllNPC)
                {
                    MoveNPC(n);
                    RenderNPC(n);
                }
                Thread.Sleep(500);

            }
        }

        static void RenderNPC(NPC npc)
        {
            Console.SetCursorPosition(npc.X, npc.Y);
            Console.ForegroundColor = npc.Foreground;
            Console.BackgroundColor = npc.Background;
            Console.WriteLine(npc.Visual);
        }

        static void MoveNPC(NPC npc)
        {
            npc.X = Clamp(npc.X + R.Next(-1, 2), 0, Console.WindowWidth);
            npc.Y = Clamp(npc.Y + R.Next(-1, 2), 0, Console.WindowHeight);


        }

        static int Clamp(int value, int min, int max)
        {
            return (value < min) ? min : (value > max) ? max : value;
        }

    }

    class NPC
    {
        public char Visual;
        public int X, Y;
        public ConsoleColor Foreground, Background;

        public NPC(char ch, int coord, ConsoleColor frgr)
        {
            Visual = ch;
            X = Y = coord;
            Foreground = frgr;
            Background = ConsoleColor.White;

        }
    }

    class NPCGenerator
    {
        Random r = new Random();
        public char[] CharSource = new char[] {'$', '@', '%', '^','&','*','~','{','#','!' };
        public ConsoleColor[] ColorSource = new ConsoleColor[] {ConsoleColor.DarkRed, ConsoleColor.DarkMagenta, ConsoleColor.Green, ConsoleColor.Red, ConsoleColor.Yellow, ConsoleColor.Gray, ConsoleColor.DarkYellow, ConsoleColor.DarkGreen, ConsoleColor.Blue, ConsoleColor.Magenta };
        public int[] CoordinatesSource = new int[] { 6, 8, 10, 12, 4, 15, 5, 17, 19, 21 };

        public NPC CreateNPC()
        {
            char NPCchar = CharSource[r.Next(0, 9)];
            ConsoleColor NPCColor = ColorSource[r.Next(0, 9)];
            int NPCCoordinates = CoordinatesSource[r.Next(0, 9)];
            NPC randomNPC = new NPC(NPCchar, NPCCoordinates, NPCColor);

            return randomNPC;
        }

    }
}