using System;

using System.Linq;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        string s = "Thu Jul 02 2015 00:00:00 GMT+01:00 (GMT Standard Time)";

​

        DateTimeOffset dto;

        if (DateTimeOffset.TryParseExact(s, "ddd MMM dd yyyy HH:mm:ss 'GMT'K '(GMT Standard Time)'", 

                                         CultureInfo.InvariantCulture,

                                         DateTimeStyles.None, out dto))

        {

             Console.WriteLine(dto);

        }

​

        //System.Globalization.DateTimeFormatInfo dtfi =

       //new System.Globalization.DateTimeFormatInfo();

       //dtfi.FullDateTimePattern = "dd/MM/yyyy HH:mm:ss zz";

​

        string second = "9 October 2014 20:23:09 BST";

        string[] formats = 

        {

            "d MMMM yyyy HH:mm:ss 'BST'",

            "d MMMM yyyy HH:mm:ss 'EST'"

        };

        DateTime date;

        if(DateTime.TryParseExact(second, formats, CultureInfo.InvariantCulture,

                                  DateTimeStyles.None, out date))

        {

             Console.WriteLine(date);       

        }

        string third = "22/02/2022 13:30 GMT";

        string[] f = 

        {

            "dd/mm/yyyy HH:mm:ss 'BST'",

            "dd/mm/yyyy HH:mm:ss 'EST'",

            "dd/mm/yyyy HH:mm:ss 'GMT'"

        };

        DateTime dateAgain;

        if(DateTime.TryParseExact(third, f, CultureInfo.InvariantCulture,

                                  DateTimeStyles.None, out dateAgain))

        {

             Console.WriteLine(date);       

        }

    }

}