0   MM/dd/yyyy  08/22/2006
1   dddd, dd MMMM yyyy  Tuesday, 22 August 2006
2   dddd, dd MMMM yyyy  HH:mm Tuesday, 22 August 2006 06:30
3   dddd, dd MMMM yyyy  hh:mm tt Tuesday, 22 August 2006 06:30 AM
4   dddd, dd MMMM yyyy  H:mm Tuesday, 22 August 2006 6:30
5   dddd, dd MMMM yyyy  h:mm tt Tuesday, 22 August 2006 6:30 AM
6   dddd, dd MMMM yyyy HH:mm:ss Tuesday, 22 August 2006 06:30:07
7   MM/dd/yyyy HH:mm    08/22/2006 06:30
8   MM/dd/yyyy hh:mm tt 08/22/2006 06:30 AM
9   MM/dd/yyyy H:mm 08/22/2006 6:30
10  MM/dd/yyyy h:mm tt  08/22/2006 6:30 AM
10  MM/dd/yyyy h:mm tt  08/22/2006 6:30 AM
10  MM/dd/yyyy h:mm tt  08/22/2006 6:30 AM
11  MM/dd/yyyy HH:mm:ss 08/22/2006 06:30:07
12  MMMM dd August 22
13  MMMM dd August 22
14  yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK  2006-08-22T06:30:07.7199222-04:00
15  yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK  2006-08-22T06:30:07.7199222-04:00
16  ddd, dd MMM yyyy HH':'mm':'ss 'GMT' Tue, 22 Aug 2006 06:30:07 GMT
17  ddd, dd MMM yyyy HH':'mm':'ss 'GMT' Tue, 22 Aug 2006 06:30:07 GMT
18  yyyy'-'MM'-'dd'T'HH':'mm':'ss   2006-08-22T06:30:07
19  HH:mm   06:30
20  hh:mm tt    06:30 AM
21  H:mm    6:30
22  h:mm tt 6:30 AM
23  HH:mm:ss    06:30:07
24  yyyy'-'MM'-'dd HH':'mm':'ss'Z'  2006-08-22 06:30:07Z
25  dddd, dd MMMM yyyy HH:mm:ss Tuesday, 22 August 2006 06:30:07
26  yyyy MMMM   2006 August
27  yyyy MMMM   2006 August

DateTime.ToString ( 'd' ) :
0   MM/dd/yyyy  08/22/2006
DateTime.ToString ( 'D' ) :
0   dddd, dd MMMM yyyy  Tuesday, 22 August 2006
DateTime.ToString ( 'f' ) :
0   dddd, dd MMMM yyyy HH:mm    Tuesday, 22 August 2006 06:30
1   dddd, dd MMMM yyyy hh:mm    tt Tuesday, 22 August 2006 06:30 AM
2   dddd, dd MMMM yyyy H:mm Tuesday, 22 August 2006 6:30
3   dddd, dd MMMM yyyy h:mm tt Tuesday, 22 August 2006 6:30 AM
The patterns for DateTime.ToString ( 'F' ) :
0   dddd, dd MMMM yyyy HH:mm:ss Tuesday, 22 August 2006 06:30:07
DateTime.ToString ( 'g' ) :
0   MM/dd/yyyy HH:mm    08/22/2006 06:30
1   MM/dd/yyyy hh:mm    tt 08/22/2006 06:30 AM
2   MM/dd/yyyy H:mm 08/22/2006 6:30
3   MM/dd/yyyy h:mm tt  08/22/2006 6:30 AM
DateTime.ToString ( 'G' ) :
0   MM/dd/yyyy HH:mm:ss 08/22/2006 06:30:07
DateTime.ToString ( 'm' ) :
0   MMMM dd August 22
DateTime.ToString ( 'r' ) :
0   ddd, dd MMM yyyy HH':'mm':'ss 'GMT' Tue, 22 Aug 2006 06:30:07 GMT
DateTime.ToString ( 's' ) :
0   yyyy'-'MM'-'dd'T'HH':'mm':'ss   2006-08-22T06:30:07
DateTime.ToString ( 'u' ) :
0   yyyy'-'MM'-'dd HH':'mm':'ss'Z'  2006-08-22 06:30:07Z
DateTime.ToString ( 'U' ) :
0   dddd, dd MMMM yyyy HH:mm:ss Tuesday, 22 August 2006 06:30:07
 DateTime.ToString ( 'y' ) :
0   yyyy MMMM 2006 August