String.Format(“{0:X}”, args[]) Function : C#.Net

Example: String.Format("{0:D}", DateTime.Now) = 17 Mar 2009

Symbol	Type	Representation
C	Currency:	(123.00)
D	Decimal	-123
E	Scientific	-1.234500E+002
F	Fixed point	-123.45
G	General (default)	-123 (default = 'G')
N	Number	-123.00
P	Percent	-12,345.00 %
R	Round-trip	-123.45
X	Hexadecimal	FFFFFF85
Date Time Formatting
Symbol	Type	Representation
d	Short date	07/09/2007
D	Long date	Monday, 09 July 2007
t	Short time	13:42
T	Long time	13:42:50
f	Full date/short time	Monday, 09 July 2007 13:42
F	Full date/long time	Monday, 09 July 2007 13:42:50
g	General date/short time	07/09/2007 13:42
G	General date/long time (default)	07/09/2007 13:42:50 (default = 'G')
M	Month	July 20
R	RFC1123	Mon, 09 Jul 2007 13:42:50 GMT
s	Sortable	2007-07-09T13:42:50
u	Universal sortable	2007-07-09 13:42:50Z (invariant)
U	Universal full	Monday, 09 July 2007 20:42:50
Y	Year	2007 July
Standard Enumeration Formatting
G	General (default)	Green (default = 'G')
F	Flags	Green (flags or integer)
D	Decimal number	3
X	Hexadecimal	00000003

Reference: String.Format - MSDN