Terraria.Sign.KillSign C# (CSharp) Method

        public static void KillSign(int x, int y)
        {
            for (int index = 0; index < 1000; ++index)
            {
                if (Main.sign[index] != null && Main.sign[index].x == x && Main.sign[index].y == y)
                    Main.sign[index] = (Sign)null;
            }
        }

        public static int ReadSign(int i, int j, bool CreateIfMissing = true)
        {
            int num  = Main.tile[i, j].frameX / 18;
            int num1 = Main.tile[i, j].frameY / 18;
            int num2 = i - num % 2;
            int num3 = j - num1;

            if (!Main.tileSign[Main.tile[num2, num3].type])
            {
                Sign.KillSign(num2, num3);
                return(-1);
            }
            int num4 = -1;
            int num5 = 0;

            while (num5 < 1000)
            {
                if (Main.sign[num5] == null || Main.sign[num5].x != num2 || Main.sign[num5].y != num3)
                {
                    num5++;
                }
                else
                {
                    num4 = num5;
                    break;
                }
            }
            if (num4 < 0 && CreateIfMissing)
            {
                int num6 = 0;
                while (num6 < 1000)
                {
                    if (Main.sign[num6] != null)
                    {
                        num6++;
                    }
                    else
                    {
                        num4                 = num6;
                        Main.sign[num6]      = new Sign();
                        Main.sign[num6].x    = num2;
                        Main.sign[num6].y    = num3;
                        Main.sign[num6].text = "";
                        break;
                    }
                }
            }
            return(num4);
        }