Asp.net mvc 4 传入的发送电子邮件Asp Net核心参数不可序列化

我有一个问题，我不知道我是否对azure和sendgrid还不太了解，我有3个托管应用程序，它们都出现了相同的错误，我会告诉你它是如何发生的，一个ajax请求被发送，它被插入到数据库中，然后通过电子邮件与sengrid一起发送通知，这一步就是错误发生的地方，但没有描述它。当我从visual studio运行它时，没有问题，一切正常，邮件到达，因此没有任何信息告诉我是否存在错误，当将其发送到生产时，一切都会影响，我以为是在系统中进行了更改，但它会影响我最近未更新的其他系统。它一直使用的配置如下：

  <package id = "Sendgrid" version = "5.0.0" targetFramework = "net45" />
  <package id = "SendGrid.SmtpApi" version = "1.3.3" targetFramework = "net45" />

错误

{
“消息”：“发生错误。”，
“ExceptionMessage”：“传入的参数不可序列化。\R\n参数名称：值”，
“ExceptionType”：“System.ArgumentException”，
“StackTrace”：“在System.Collections.ListDictionaryInternal.Add（对象键，对象值）\r\n在myapp.Infrastructure.Mail.SendgridAgent.Send（MailMessage-MailMessage）\r\n在myapp.Core.CardPacientService.SendGreetingMail（PatientCard项）\r\n在myapp.Core.PatientCardService.Save（PatientCard项）\r\n在myapp.Web.Api.CardsController.Post（PatientCardViewModel viewModel）\r\n在lambda_方法（闭包，对象，对象[]）上\r\n在System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.c_u显示类13.b_uc（对象实例，对象[]方法参数）\r\n位于System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute（对象实例，对象[]参数）\r\n位于System.Web.Http.Controllers.ReflectedHttpActionDescriptor.C_uDisplayClass5.b_u4（）\r\n位于System.Threading.Tasks TaskHelpers.RunSynchronously[TResult]（Func`1 Func，CancellationToken CancellationToken）
}em.ArgumentException“，
“StackTrace”：“在System.Collections.ListDictionaryInternal.Add（对象键，对象值）\r\n在myapp.Infrastructure.Mail.SendgridAgent.Send（MailMessage-MailMessage）\r\n在myapp.Core.CardPacientService.SendGreetingMail（PatientCard项）\r\n在myapp.Core.PatientCardService.Save（PatientCard项）\r\n在myapp.Web.Api.CardsController.Post（PatientCardViewModel viewModel）\r\n在lambda_方法（闭包，对象，对象[]）上\r\n在System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.c_u显示类13.b_uc（对象实例，对象[]方法参数）\r\n位于System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute（对象实例，对象[]参数）\r\n位于System.Web.Http.Controllers.ReflectedHttpActionDescriptor.C_uDisplayClass5.b_u4（）\r\n位于System.Threading.Tasks TaskHelpers.RunSynchronously[TRe]

您可以发布将

PatientCard

转换为

MailMessage

的代码吗？

{
  "Message": "An error has occurred.",
  "ExceptionMessage": "Argument passed in is not serializable. \ R \ nParameter name: value",
  "ExceptionType": "System.ArgumentException",
  "StackTrace": "at System.Collections.ListDictionaryInternal.Add (Object key, Object value) \ r \ n at myapp.Infrastructure.Mailing.SendgridAgent.Send (MailMessage mailMessage) \ r \ n at myapp.Core.CardPacienteService.SendGreetingMail (PatientCard item) \ r \ n at myapp.Core.PatientCardService.Save (PatientCard item) \ r \ n at myapp.Web.Api.CardsController.Post (PatientCardViewModel viewModel) \ r \ n at lambda_method (Closure, Object, Object []) \ r \ n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor. <> c__DisplayClass13. <GetExecutor> b__c (Object instance, Object [] methodParameters) \ r \ n at System.Web.Http.Controllers. ReflectedHttpActionDescriptor.ActionExecutor.Execute (Object instance, Object [] arguments) \ r \ n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor. <> C__DisplayClass5. <ExecuteAsync> b__4 () \ r \ n at System.Threading.Tasks TaskHelpers.RunSynchronously [TResult] (Func`1 func, CancellationToken cancellationToken) "
}em.ArgumentException",
  "StackTrace": "at System.Collections.ListDictionaryInternal.Add (Object key, Object value) \ r \ n at myapp.Infrastructure.Mailing.SendgridAgent.Send (MailMessage mailMessage) \ r \ n at myapp.Core.CardPacienteService.SendGreetingMail (PatientCard item) \ r \ n at myapp.Core.PatientCardService.Save (PatientCard item) \ r \ n at myapp.Web.Api.CardsController.Post (PatientCardViewModel viewModel) \ r \ n at lambda_method (Closure, Object, Object []) \ r \ n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor. <> c__DisplayClass13. <GetExecutor> b__c (Object instance, Object [] methodParameters) \ r \ n at System.Web.Http.Controllers. ReflectedHttpActionDescriptor.ActionExecutor.Execute (Object instance, Object [] arguments) \ r \ n at System.Web.Http.Controllers.ReflectedHttpActionDescriptor. <> C__DisplayClass5. <ExecuteAsync> b__4 () \ r \ n at System.Threading.Tasks TaskHelpers.RunSynchronously [TRe