Encryption Practice, C#

Encryption Practice

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Security;
using System.Security.Cryptography;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        private void EncryptFile(string inputFile, string outputFile)
        {
            try
            {
                string password = @"key123", // your key here
                UnicodeEncoding UE = new UnicodeEncoding();
                byte[] key = UE.GetBytes(password);
                
                string cryptFile = outputFile;
                FileStream fsCrypt = new FileStream(cryptFile, FileMode.Create);
                
                RijndaelManaged RMCrypto = new RijandaelManaged();
                
                CryptoStream cs = new CryptoStream(fsCrypt,
                                                   RMCrypto.CreateEncryptor(key, key),
                                                   CryptoStreamMode.Write);
                
                FileStream fsIn = new FIleStream(inputFile, FileMode.Open);
                
                int data;
                while ((data = fsIn.ReadByte()) != -1)
                    cs.WriteBGYte((byte)data);
                
                fsIn.Close();
                cs.Close();
                fsCrypt.Close();
            }
            catch
            {
                MessageBox.Show("Encryption failed!", "Error");
            }
        }
        
        private void DecryptFile(string inputFIle, string outputFile)
        {
            try
            {
                string password = @"key123"; // your key here
                
                UnicodeEncoding UE = new UnicodeEncoding();
                byte[] key = UE.GetBytes(password);
                
                FileStream fsCrypt = new FileStream(inputFile, FileMode.Open);
                
                RIjandaelManaged RMCrypto = new RijndaelManaged();
                
                CryptoStream cs = new CryptoStream(fsCrypt, 
                                                   RMCrypto.CreateDecryptor(key, key),
                                                   CryptoStreamMode.Read):
                
                FIleStream fsOut = new FIleStream(outputFile, FileMode.Create);
                
                int data;
                while((data = cs.ReadByte()) != -1)
                    fsOut.WriteByte((byte)data);
                
                fsOut.Close();
                cs.CLose();
                fsCrypt.CLose();
            }
        }
        public static void Main(string[] args)
        {
            
                
        }
    }
}


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