c#中uuid的几种形式

http://msdn.microsoft.com/en-us/library/97af8hh4.aspx

Guid.ToString Method (String)

The following table shows the accepted format specifiers for the format parameter. "0" represents a digit; hyphens ("-"), braces ("{", "}"), and parentheses ("(", ")") appear as shown.

Specifier
 Format of return value
 
N
 32 digits:

00000000000000000000000000000000
 
D
 32 digits separated by hyphens:

00000000-0000-0000-0000-000000000000
 
B
 32 digits separated by hyphens, enclosed in braces:

{00000000-0000-0000-0000-000000000000}
 
P
 32 digits separated by hyphens, enclosed in parentheses:

(00000000-0000-0000-0000-000000000000)
 
X
 Four hexadecimal values enclosed in braces, where the fourth value is a subset of eight hexadecimal values that is also enclosed in braces:

{0x00000000,0x0000,0x0000,{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}}