创建Guid:
System.Guid.NewGuid().ToString(format)
format: N, D, B, P
格式说明符 返回值的格式
N 32位:
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
如:e92b8e30a6e541f6a6b9188230a23dd2
D 由连字符分隔的32位数字:
xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
如:e92b8e30-a6e5-41f6-a6b9-188230a23dd2
B 括在大括号中、由连字符分隔的32位数字:
{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
如:{e92b8e30-a6e5-41f6-a6b9-188230a23dd2}
P 括在圆括号中、由连字符分隔的32位数字:
(xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
如:(e92b8e30-a6e5-41f6-a6b9-188230a23dd2)