kalau dah lepas pakai X509Certificate2, release le dari memory selepas dipakai. kalau buat sistem hi-speed dan loading certificate beribu-ribu kali, lama2 memory pon habis. cert.Reset(); //buang isi kandungan cert yang load tadi source: https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.x509certificates.x509certificate2.reset?redirectedfrom=MSDN&view=netframework-4.7.2