Program.cs - C# find slope of two points

// slope of 2 points
static void Main(string[] args)
        {
            // (1, 1) (1, 1)
            string E = Console.ReadLine();

            int X1 = int.Parse(E.Split('(')[1].Split(',')[0]);
            int X2 = int.Parse(E.Split('(')[1].Split(',')[1].Split(')')[0]);
            int Y1 = int.Parse(E.Split('(')[2].Split(',')[0]);
            int Y2 = int.Parse(E.Split('(')[2].Split(',')[1].Split(')')[0]);
            Console.WriteLine((Y1 - Y2) / (X1 - X2));
            Main(null);
        }