Signature validation faild.

[rungsoso]

Verify signature has faild

if (request == null) { throw new ArgumentNullException(nameof(request)); }
if (channelSecret == null) { throw new ArgumentNullException(nameof(channelSecret)); }

            var content = await request.Content.ReadAsStringAsync();

            var xLineSignature = request.Headers.GetValues("X-Line-Signature").FirstOrDefault();
            if (string.IsNullOrEmpty(xLineSignature) || !**VerifySignature(channelSecret, xLineSignature, content)**)
            {
                **throw new InvalidSignatureException("Signature validation faild.");**
            }

            dynamic json = JsonConvert.DeserializeObject(content);

            if (!string.IsNullOrEmpty(botUserId))
            {
                if (botUserId != (string)json.destination)
                {
                    throw new UserIdMismatchException("Bot user ID does not match.");
                }
            }
            return WebhookEventParser.ParseEvents(json.events);