I try to encrypt a file using the example MSDN https://msdn.microsoft.com/ru-ru/library/system.security.cryptography.aes(v=vs.110).aspx When I encrypt a .txt file, then everything is fine, but when I try to encrypt other files (.bmp, .pdf ...), then the file is not decrypted. Where is the error there?
I modified the code to download the file
internal static void EncryptAes(string pathData, string pathEnCrypt) { string plainText; using (StreamReader sr = new StreamReader(pathData)) plainText = sr.ReadToEnd(); byte[] encrypted; // Create an Aes object // with the specified key and IV. using (Aes aesAlg = Aes.Create()) { aesAlg.Key = Key; aesAlg.IV = IV; // Create a decrytor to perform the stream transform. ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV); // Create the streams used for encryption. using (MemoryStream msEncrypt = new MemoryStream()) { using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)) { using (StreamWriter swEncrypt = new StreamWriter(csEncrypt)) { //Write all data to the stream. swEncrypt.Write(plainText); } encrypted = msEncrypt.ToArray(); } } using (FileStream fstream = new FileStream(pathEnCrypt, FileMode.Create)) fstream.Write(encrypted, 0, encrypted.Length); } } 
// Create a decrytor to perform the stream transform. ICryptoTransform encryptor = aesAlg.CreateEncryptor(((aesAlg.Key, aesAlg.IV);