Convert Java Encryption code to c#

Java Code

String password = "JQH1867g5c6f1629f122fb108b111b1011f11111"; String encrypt_response = AES128.encrypt("Hello", password); System.out.println("encrypt_response = "+ encrypt_response); String dencrypt_response = AES128.decrypt(encrypt_response, password); System.out.println("dencrypt_response = "+ dencrypt_response);

public class AES128 { @SuppressWarnings("null") public static String encrypt(final String word, final String password) { try { byte[] ivBytes; SecureRandom random = new SecureRandom(); byte bytes[] = new byte[20]; random.nextBytes(bytes); byte[] saltBytes = bytes; SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2withHmacSHA1"); PBEKeySpec spec = new PBEKeySpec(password.toCharArray(), saltBytes, 50, 128); SecretKey secretKey = factory.generateSecret(spec); SecretKeySpec secret = new SecretKeySpec(secretKey.getEncoded(), "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); cipher.init(Cipher.ENCRYPT_MODE, secret); AlgorithmParameters params = cipher.getParameters(); ivBytes = params.getParameterSpec(IvParameterSpec.class).getIV(); byte[] encryptedTextBytes = cipher.doFinal(word.getBytes("UTF-8")); // prepend salt and vi byte[] buffer = new byte[saltBytes.length + ivBytes.length + encryptedTextBytes.length]; System.arraycopy(saltBytes, 0, buffer, 0, saltBytes.length); System.arraycopy(ivBytes, 0, buffer, saltBytes.length, ivBytes.length); System.arraycopy(encryptedTextBytes, 0, buffer, saltBytes.length + ivBytes.length, encryptedTextBytes.length); new Base64(); return new Base64().encodeToString(buffer); } catch (BadPaddingException | InvalidParameterSpecException | NoSuchAlgorithmException | InvalidKeySpecException | NoSuchPaddingException | InvalidKeyException | IllegalBlockSizeException | UnsupportedEncodingException ex2) { final Exception ex = null; final Exception e = ex; return "ER001" + e.toString(); } }

@SuppressWarnings("null") public static String decrypt(final String encryptedText, final String password) { try { Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); // strip off the salt and iv ByteBuffer buffer = ByteBuffer.wrap(new Base64().decode(encryptedText)); byte[] saltBytes = new byte[20]; buffer.get(saltBytes, 0, saltBytes.length); byte[] ivBytes1 = new byte[cipher.getBlockSize()]; buffer.get(ivBytes1, 0, ivBytes1.length); byte[] encryptedTextBytes = new byte[buffer.capacity() - saltBytes.length - ivBytes1.length]; buffer.get(encryptedTextBytes); SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1"); PBEKeySpec spec = new PBEKeySpec(password.toCharArray(), saltBytes, 50, 128); SecretKey secretKey = factory.generateSecret(spec); SecretKeySpec secret = new SecretKeySpec(secretKey.getEncoded(), "AES"); cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(ivBytes1)); byte[] decryptedTextBytes = null; try { decryptedTextBytes = cipher.doFinal(encryptedTextBytes); } catch (Exception e) { e.printStackTrace(); } return new String(decryptedTextBytes); } catch (NoSuchAlgorithmException | InvalidKeySpecException | NoSuchPaddingException | InvalidKeyException | InvalidAlgorithmParameterException ex2) { final Exception ex = null; final Exception e = ex; return "ER001" + e.toString(); } }

Add C# Code 

    class Program
    {
		 public string encrypt(string word, string password)
		{
			try
			{
						byte[] ivBytes;
						Random random = new Random();
						byte[] bytes = new byte[20];
						random.NextBytes(bytes);
					byte[] saltBytes = bytes;
				
				RijndaelManaged rijndaelManaged = new RijndaelManaged();
				var keyGen = new Rfc2898DeriveBytes(password, saltBytes, 50);
				Rijndael rijndael = Rijndael.Create();
				byte[] key = keyGen.GetBytes(rijndael.KeySize / 8);
				byte[] AESIV = keyGen.GetBytes(rijndael.BlockSize / 8);
				rijndaelManaged.Mode = CipherMode.CBC;
				rijndaelManaged.Padding = PaddingMode.PKCS7;
				rijndaelManaged.Key = key;
				rijndaelManaged.IV = AESIV;
			
				var plainBytes = Encoding.UTF8.GetBytes(word);
				byte[] encryptedTextBytes = rijndaelManaged.CreateEncryptor().TransformFinalBlock(plainBytes, 0, plainBytes.Length);
				
				return Convert.ToBase64String(encryptedTextBytes);//new Base64().encodeToString(buffer);
		// return Base64.encodeBase64String(buffer);
	} catch(Exception ex)
		{
			return "ER001" + ex.ToString();
		}
	}


		public string decrypt(string encryptedText, string password)
		{
			try
			{
				//Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
				RijndaelManaged rijndaelManaged = new RijndaelManaged();

				// strip off the salt and iv
				//ByteBuffer buffer = ByteBuffer.wrap(Encoding.UTF8.GetBytes(encryptedText)); 
				byte[] saltBytes = new byte[20];
				byte[] ivBytes1 = new byte[16];
                MemoryStream stream = new MemoryStream();
                using (BinaryWriter writer = new BinaryWriter(stream))
                {
                    writer.Write(Convert.FromBase64String(encryptedText));
                    writer.Write(saltBytes, 0, saltBytes.Length);
                    writer.Write(ivBytes1, 0, ivBytes1.Length);


                }
                byte[] buffer = stream.ToArray();

                byte[] encryptedTextBytes = new byte[16];

                var keyGen = new Rfc2898DeriveBytes(password, saltBytes, 50);
				//cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(ivBytes1));
				//Rijndael rijndael = Rijndael.Create();
				byte[] key = keyGen.GetBytes(128 / 8);
				//byte[] AESIV = keyGen.GetBytes(128 / 8);
				rijndaelManaged.Mode = CipherMode.CBC;
				rijndaelManaged.Padding = PaddingMode.PKCS7;
				rijndaelManaged.Key = key;
				rijndaelManaged.IV = ivBytes1;



                //return plaintext;

                byte[] decryptedTextBytes = null;
				try
				{
					//decryptedTextBytes = cipher.doFinal(encryptedTextBytes);
					decryptedTextBytes = rijndaelManaged.CreateDecryptor().TransformFinalBlock(buffer, 0, buffer.Length);
				}
				catch (Exception ex)
				{
					return "ERROR 1" + ex.ToString();
				}
				return Encoding.UTF8.GetString(decryptedTextBytes);
			}
			catch (Exception ex2) {
				
				return "ER001" + ex2.ToString();
			}
			}

	
		
		static void Main(string[] args)
        {

			Program p = new Program();
			string password = "JQH1867g5c6f1629f122fb108b111b1011f11111";
			string encrypt_response = p.encrypt("Hello", password);
			Console.WriteLine("encrypt_response = " + encrypt_response);

			String dencrypt_response = p.decrypt(encrypt_response, password);
			Console.WriteLine("dencrypt_response = " + dencrypt_response);
			Console.ReadLine();
		}
    }

Can anyone help me with this conversion of code.