c# - 復号化されたテキストにランダムな文字が表示されるのはなぜですか?

Answer 1

Thanks to Hans Passant I found the solution. The problem was that I was using Encoding.GetString() or Encoding.GetBytes() when I was encrypting and decrypting, when I should have been using Convert.ToBase64String() or Convert.FromBase64String().