C＃中的Sendgrid动态模板和替换

Question

我正在尝试通过Sendgrid api发送电子邮件，但出现此错误：

  

{“错误”：[{”消息”：“动态替换不能使用   模板“，”字段“：”个性化.0。替换“，”帮助“：” http://sendgrid.com/docs/API_Reference/Web_API_v3/Mail/errors.html#message.personalizations.substitutions“}]}

我正在使用的代码是这样的：

                var sendGridMessageWithTemplate = new SendGridMessage();
                sendGridMessageWithTemplate.From = new EmailAddress("donotreply@mydomain.com");
                Personalization personalization = new Personalization();
                var substitions = new System.Collections.Generic.Dictionary<string, string>();
                substitions.Add("-recipientCompanyName-", "test company name");

                personalization.Tos = new System.Collections.Generic.List<EmailAddress>();
                personalization.Tos.Add(new EmailAddress("someemail@gmail.com"));
                sendGridMessageWithTemplate.Personalizations = new List<Personalization>();
                sendGridMessageWithTemplate.Personalizations.Add(personalization);
                sendGridMessageWithTemplate.AddSubstitutions(substitions);

                sendGridMessageWithTemplate.TemplateId = "d-mytemplateid";

                var result = mailService.SendAsync(sendGridMessageWithTemplate).Result;

您知道我在做什么错吗，如何替换模板中的令牌？