using System;

public class Program

{

    public static void Main()

    {

            char[] x, y;

            string c, d, e, f;

            double g, h, i, j;

​

            x = new char[2];

            x[0] = '1';

            x[1] = '3';

​

            y = new char[2];

            y[0] = '5';

            y[1] = '9';

​

            c = Convert.ToString(x[0]);

            d = Convert.ToString(x[1]);

            e = Convert.ToString(y[0]);

            f = Convert.ToString(y[1]);

​

            g = Convert.ToDouble(c) / 7;

            h = Convert.ToDouble(d) / 7;

            i = Convert.ToDouble(e) / 7;

            j = Convert.ToDouble(f) / 7;

​

            Console.WriteLine("Char to String");

            Console.WriteLine(c);

            Console.WriteLine(d);

            Console.WriteLine(e);

            Console.WriteLine(f);

            Console.WriteLine("String to Double");

            Console.WriteLine(g);

            Console.WriteLine(h);

            Console.WriteLine(i);

            Console.WriteLine(j);

​

    }

}