an attempt at making a usable code thing (failed lol), C#

an attempt at making a usable code thing (failed lol)

// i have no idea what is wrong with this lol
// but it kinda just throws errors
// run it to see them

using System;
using System.Collections.Generic;
using System.Web;
using System.IO;
using System.Text;
using System.Security.Cryptography;
using System.Configuration;
using System.Data;
using System.Globalization;
using System.Text.RegularExpressions;
using System.Net.NetworkInformation;
using System.Globalization;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {           
            Console.WriteLine("encrypt or decrypt?");
            string inout = Console.ReadLine();
            
            
            if (inout == "encrypt")
            {
                Console.WriteLine("enter your number");
                Console.WriteLine(Encrypt(Console.ReadLine()));
                    
            }
            else if (inout == "decrypt") {
                Console.WriteLine("enter your encrypted string");
                Console.WriteLine(Decrypt(Console.ReadLine()));
            }
            else { Console.WriteLine("answer not recognized"); }
            
            
            Console.WriteLine(Decrypt("ZgfGBmLnFzeViVS61KbmJA=="));
            
        }
        public static string Encrypt(string clearText)
        {
            string EncryptionKey = "8y/B?E(H+MbQeThWmZq3t6w9z$C&F)J@";
            byte[] clearBytes = Encoding.Unicode.GetBytes(clearText);
            using (Aes encryptor = Aes.Create())
            {
                Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
                encryptor.Key = pdb.GetBytes(32);
                encryptor.IV = pdb.GetBytes(16);
                using (MemoryStream ms = new MemoryStream())
                {
                    using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateEncryptor(), CryptoStreamMode.Write))
                    {
                        cs.Write(clearBytes, 0, clearBytes.Length);
                        cs.Close();
                    }
                    clearText = Convert.ToBase64String(ms.ToArray());
                }
            }
            return clearText;
        }

public static string Decrypt(string cipherText)
        {
            string EncryptionKey = "8y/B?E(H+MbQeThWmZq3t6w9z$C&F)J@";
            byte[] cipherBytes = Convert.FromBase64String(cipherText);
            using (Aes encryptor = Aes.Create())
            {
                Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
                encryptor.Key = pdb.GetBytes(32);
                encryptor.IV = pdb.GetBytes(16);
                using (MemoryStream ms = new MemoryStream())
                {
                    using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
                    {
                        cs.Write(cipherBytes, 0, cipherBytes.Length);
                        cs.Close();
                    }
                    cipherText = Encoding.Unicode.GetString(ms.ToArray());
                }
            }
            return cipherText;
        }
    }
}


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