我在解碼這個 base64 字符串時遇到問題，它總是返回“Base-64 字符數組或字符串的長度無效”。但我設法在“ https://www.base64decode.org/ ” 在線解碼這些是我的代碼：string base64Encoded = "eyJ4NXQjUzI1NiI6IndVWUdZWXp5dTJPMzNtVjY1WHFBVzBiTFlMeU5TU2VKZFlGTldKNnpzY0kiLCJ4NXQiOiJ0V3lmNTA0aTM3TXZxN0t1eEVyQTY4VTE4c1kiLCJraWQiOiJTSUdOSU5HX0tFWSIsImFsZyI6IlJTMjU2In0";string base64Decoded;byte[] data = Convert.FromBase64String(base64Encoded);base64Decoded = Encoding.UTF8.GetString(data);