const int strength = 2048;
            const string password = "password";
            const string signatureAlgorithm = "SHA256WithRSA";

            var randomGenerator = new CryptoApiRandomGenerator();
            var random = new SecureRandom(randomGenerator);
            var certificateGenerator = new X509V3CertificateGenerator();
            var serialNumber = BigIntegers.CreateRandomInRange(BigInteger.One, BigInteger.ValueOf(long.MaxValue), random);
                        certificateGenerator.SetSerialNumber(serialNumber);

            certificateGenerator.SetSignatureAlgorithm(signatureAlgorithm);

            var subjectDn = new X509Name("CN=localhost");
            var issuerDn = subjectDn;

            certificateGenerator.SetIssuerDN(issuerDn);
            certificateGenerator.SetSubjectDN(subjectDn);

            var notBefore = DateTime.UtcNow.Date;
            var notAfter = notBefore.AddYears(5);

            certificateGenerator.SetNotBefore(notBefore);
            certificateGenerator.SetNotAfter(notAfter);

            var keyGenerationParameters = new KeyGenerationParameters(random, strength);

            var keyPairGenerator = new RsaKeyPairGenerator();
            keyPairGenerator.Init(keyGenerationParameters);
            var subjectKeyPair = keyPairGenerator.GenerateKeyPair();

            certificateGenerator.SetPublicKey(subjectKeyPair.Public);

            var issuerKeyPair = subjectKeyPair;
            var certificate = certificateGenerator.Generate(issuerKeyPair.Private, random);

            var store = new Pkcs12Store();
            var friendlyName = certificate.SubjectDN.ToString();

            var certificateEntry = new X509CertificateEntry(certificate);

            store.SetCertificateEntry(friendlyName, certificateEntry);
            store.SetKeyEntry(friendlyName, new AsymmetricKeyEntry(subjectKeyPair.Private), new[] { certificateEntry });

            var stream = new MemoryStream();
            store.Save(stream, password.ToCharArray(), random);

            File.WriteAllBytes("temp.pfx", stream.ToArray());