public void Encrypt_Dcrypt_Test()
        {
            var keypair = RSAHelper.GenerateKeyPair();

            var encrypted = RSAHelper.EncryptAsBase64("hello", keypair.PublicKey);
            var decrypted = RSAHelper.DecryptFromBase64(encrypted, keypair.PrivateKey);

            Assert.Equal("hello", decrypted);

            //pkcs8密钥
            var pkcs8 = RSAHelper.PKCS1ToPKCS8(keypair.PrivateKey);

            var decrypted2 = RSAHelper.DecryptFromBase64(encrypted, pkcs8, keyFormat: RSAKeyFormat.PKCS8);

            Assert.Equal("hello", decrypted2);
        }