using System;using System.Globalization; using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        //Unix Stat CMD CANNOT BE FORMALIZED USING DATETIME and.or DATETIMEOFFSET FORMATS in .NET

        //                                         FFFFFFFFF  not accepted!

        string dateString = "2010-11-29 17:56:22.000000000 -0800"; 

        DateTimeOffset unixstatdt = new DateTimeOffset();  

        //                                                                123456789

        if (DateTimeOffset.TryParseExact(dateString, "yyyy-MM-dd HH:mm:ss.FFFFFFFFF zzz", CultureInfo.InvariantCulture, DateTimeStyles.None, out unixstatdt))

        {

                Console.WriteLine("Worked parsed Unix stat datetime with time zone\n        {0}", unixstatdt.ToString ("o"));

        }

        else

        {

            Console.WriteLine("Failed to parsed Unix stat datetime");

        }

        //SOLUTION 

        //WE MUST TRUNCATE THE VALUE, CRUDE BUT IT WORKS down to 7 characters from 9 

        string LinuxStatCMDpattern = @"(\d{4}-\d{2}-\d{2})\s(\d{2}:\d{2}:\d{2}\.)(\d{7})\d{2}\s ([\+-]\d{4})";

        string substitution = @"$1 $2$3 $4";

        //ACCEPTED F's of length 7 max

        //                                   FFFFFFF

        string input = @"2014-03-30 23:14:47.658210121 -0500";

        RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnorePatternWhitespace;

        Match m = Regex.Match(input, LinuxStatCMDpattern, options); 

        Regex regex = new Regex(LinuxStatCMDpattern, options);

        string result = string.Empty; 

        if (m.Success) 

            result = regex.Replace(input, substitution);                              

        Console.WriteLine("Trimmed "  + result);

​

        if (DateTimeOffset.TryParseExact(result, "yyyy-MM-dd HH:mm:ss.FFFFFFF zzz", CultureInfo.InvariantCulture, DateTimeStyles.None, out unixstatdt))

        {

                Console.WriteLine("Pass 2: Worked parsed Unix stat datetime with time zone\n        {0}", unixstatdt.ToString("o"));

        }

        else

        {

            Console.WriteLine("Pass 2: Failed");

        }

    }

}