public void EncryptTest(string keyFilePath)
{
// Arrange
var rsa = new RSACryptoServiceProvider();
rsa.ImportPrivateKeyFromPemFile(keyFilePath);
string plainText = "laggage coding changes myworld";
// Act
string encrypted = rsa.EncryptToBase64(plainText);
string decrypted = rsa.DecryptFromBase64(encrypted);
// Assert
Assert.Equal(plainText, decrypted);
}