public string ToString (string format);
Parameters
format
String
A single format specifier that indicates how to format the value of this Guid. The format parameter can be "N", "D", "B", "P", or "X". If format is null or an empty string (""), "D" is used.
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}}