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DateTimeFormatInfo GetAllDateTimePatterns

using System; using System.Collections.Generic; using System.Globalization; using System.IO; using System.Text; using System.Security.Cryptography; public class MainClass {     public static void Main()     {         DateTime dt1 = new DateTime(2004, 10, 9, 22, 47, 35, 259);         DateTimeFormatInfo di = new DateTimeFormatInfo();         for (char c = 'a'; c <= 'z'; c++)         {             try             {                 foreach (string s in di.GetAllDateTimePatterns(c))                 {                     Console.WriteLine("'{0}': {1} - {2}/{3}", c, s,                         dt1.ToString(c.ToString()), dt1.ToString(s));                 }                 char cUpper = Char.ToUpper(c);                 foreach (string s in di.GetAllDateTimePatterns(cUpper))                 {                     Console.WriteLine("'{0}': {1} - {2}", cUpper, s,                         dt1.ToString(cUpper.ToString()), dt1.ToString(s));                 }             }             catch (ArgumentException)             {                 // Ignore--specifier not found.             }         }     } }