C# Guid.ToString()

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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}}

原文：https://www.cnblogs.com/ArvinZhao/p/14776662.html