Case sensitivity not working in ToString()

[vbisbest]

According to the UUID spec, the value is case sensitive. The ToString() function in UUID however lower cases everything. Is there a way to maintain case?

[mholt]

Huh? UUIDs are 128-bit numbers, there is no "case" in UUIDs.

The only requirement by spec is that generators output the UUIDs in lowercase:

The hexadecimal values "a" through "f" are output as lower case characters and are case insensitive on input.