[Mono-dev] Data protection failed exception

[Neale Ferguson]

Further to the problem, tt seems to be a threading issue since if a lock
is put around this method call:

return ProtectedData.Protect(data, extraEntropy, dataProtectionScope);

then it would work. This seems to try an access some file in .mono/keypair
and it seems to be some concurrency issue since we have multiple threads
all calling this code at the same time and that’s where it get tripped up.