Csharp mobile keypad

Code:
class Program
    {
        static void Main(string[] args)
        {
            char[][] arr = new char[10][];
            arr[0] = new char[2];
            arr[1] = new char[2];
            arr[2] = new char[4];
            arr[3] = new char[4];
            arr[4] = new char[4];
            arr[5] = new char[4];
            arr[6] =
...