Encryption of string in C#

//This class is for encrypt the value
//call this method with two parameters text and key "01AB=$6Q"

class EncryptdecryptClass
{
        public static string Encrypt(string text, string key)
        {

            byte[] encodedkey;
            byte[] iv = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
            byte[] bytes;

            encodedkey = Encoding.UTF8.GetBytes(key);
            DESCryptoServiceProvider csp = new DESCryptoServiceProvider();

            bytes = Encoding.UTF8.GetBytes(text);
            MemoryStream ms = new MemoryStream();

            try
            {
                CryptoStream cs = new CryptoStream(ms, csp.CreateEncryptor(encodedkey, iv), CryptoStreamMode.Write);

                cs.Write(bytes, 0, bytes.Length);
                cs.FlushFinalBlock();

            }
            catch (Exception ex)
            {
                Logger.LogInfo(ex);
            }

            return Convert.ToBase64String(ms.ToArray());

        }

}