title: How to get list of opened emails which I send through send grid in specific category in C#
body: <p>Is there way to get list of opened emails which are send through sendgrid in specific category in c#?</p>
  
  <p>I have already tried:</p>
  
  <p>According to support we can Event Webhook but is there way to use it in C# </p>
  
  <p>also there is link 
  <a href="https://sendgrid.com/docs/API_Reference/Web_API/filter_settings.html#-Open-Tracking" rel="nofollow">https://sendgrid.com/docs/API_Reference/Web_API/filter_settings.html#-Open-Tracking</a></p>
  
  <p>but how to use it in C#?</p>
  
  <p>Also there are api for bounce 
  <a href="https://sendgrid.com/api/bounces.get.xml" rel="nofollow">https://sendgrid.com/api/bounces.get.xml</a></p>
  
  <p>is there any for opened ?</p>
  
  <p>also according to sendgrid there is api 
  sendgrid.com/docs/API_Reference/Webhooks/event.html</p>
  
  <p>but this api only return when any email will be opened next time , 
  but this is for future opened emails , my issue is that i have sent emails to user and they are already opened
  and now i want to have list of those emails which have already opened</p>