Cryptography - AES Encyption

AesEncryption.cs

using System.IO;
using System.Security.Cryptography;

namespace CryptographyInDotNet
{
    public class AesEncryption 
    {
        public byte[] GenerateRandomNumber(int length)
        {
            using (var randomNumberGenerator = new RNGCryptoServiceProvider())
            {
                var randomNumber = new byte[length];
                randomNumberGenerator.GetBytes(randomNumber);

                return randomNumber;
            }
        }

        public byte[] Encrypt(byte[] dataToEncrypt, byte[] key, byte[] iv)
        {            
            using (var aes = new AesCryptoServiceProvider())
            {
                aes.Mode = CipherMode.CBC;
                aes.Padding = PaddingMode.PKCS7;
                
                aes.Key = key;
                aes.IV = iv;

                using (var memoryStream = new MemoryStream())
                {
                    var cryptoStream = new CryptoStream(memoryStream, aes.CreateEncryptor(), 
                        CryptoStreamMode.Write);

                    cryptoStream.Write(dataToEncrypt, 0, dataToEncrypt.Length);
                    cryptoStream.FlushFinalBlock();

                    return memoryStream.ToArray();
                }
            }
        }

        public byte[] Decrypt(byte[] dataToDecrypt, byte[] key, byte[] iv)
        {                                
            using (var aes = new AesCryptoServiceProvider())
            {
                aes.Mode = CipherMode.CBC;
                aes.Padding = PaddingMode.PKCS7;

                aes.Key = key;
                aes.IV = iv;

                using (var memoryStream = new MemoryStream())
                {                       
                    var cryptoStream = new CryptoStream(memoryStream, aes.CreateDecryptor(), 
                        CryptoStreamMode.Write);

                    cryptoStream.Write(dataToDecrypt, 0, dataToDecrypt.Length);
                    cryptoStream.FlushFinalBlock();

                    var decryptBytes = memoryStream.ToArray();

                    return decryptBytes;
                }
            }                            
        }
    }
}

Program.cs

using System;
using System.Text;

namespace CryptographyInDotNet
{
    class Program
    {
        static void Main()
        {           
            var aes = new AesEncryption();
            var key = aes.GenerateRandomNumber(32);
            var iv = aes.GenerateRandomNumber(16);
            const string original = "Text to encrypt";

            var encrypted = aes.Encrypt(Encoding.UTF8.GetBytes(original), key, iv);
            var decrypted = aes.Decrypt(encrypted, key, iv);

            var decryptedMessage = Encoding.UTF8.GetString(decrypted);

            Console.WriteLine("AES Encryption Demonstration in .NET");
            Console.WriteLine("------------------------------------");
            Console.WriteLine();
            Console.WriteLine("Original Text = " + original);
            Console.WriteLine("Encrypted Text = " + Convert.ToBase64String(encrypted));
            Console.WriteLine("Decrypted Text = " + decryptedMessage);
            
            Console.ReadLine();
        }
    }
}