using System;

​

public class Program

{

    public static void Main()

    {

        int value = 19990;

        string specifier;

        // Use standard numeric format specifier.

        specifier = "G";

        Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));

        // Displays:    G: -16325

        specifier = "C";

        Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));

        // Displays:    C: ($16,325.00)

        specifier = "D8";

        Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));

        // Displays:    D8: -00016325

        specifier = "E4";

        Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));

        // Displays:    E4: -1.6325E+004

        specifier = "e3";

        Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));

        // Displays:    e3: -1.633e+004

        specifier = "F";

        Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));

        // Displays:    F: -16325.00

        specifier = "N";

        Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));

        // Displays:    N: -16,325.00

        specifier = "P";

        Console.WriteLine("{0}: {1}", specifier, (value / 100000).ToString(specifier));

        // Displays:    P: -16.33 %

        specifier = "X";

        Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));

        // Displays:    X: FFFFC03B 

        // Use custom numeric format specifiers.

        specifier = "0,0.000";

        Console.WriteLine("{0}: {1}", specifier, value.ToString(specifier));

        // Displays:    0,0.000: -16,325.000

        specifier = "#,#.00#;(#,#.00#)";

        Console.WriteLine("{0}: {1}", specifier, (value * -1).ToString(specifier));

        specifier = "##,#0; (##,#0)";

        Console.WriteLine("{0}: {1}", specifier, (value).ToString(specifier));

    // Displays:    #,#.00#;(#,#.00#): 16,325.00

    }

}