Hello,

In the code for tryParse there isn't a check that the characters are in the 0-9a-fA-F range. So for an uuid like b0a6fe41-a360-6e22-3381-7de3410b4z07, the result of try parse is true.

Also the size should be exactly 36 chars with hyphens or it will also return true for
b0a6fe41-a360-6e22-3381-7de3410b4z07zzzz.

And if the format without hypes is supported, size should be restricted to exactly 32 chars,

RFC4122 states that the chars should be hex digits.