How to add Multiple Categories in the SendGrid Email in C#

Question

How to add multiple categories in the sendgrid smtp api in c#? If I use the below code to add the category :

1.) var message=SendGrid.GetInstance();

2.) message.Header.SetCategory(“EmailName”);

It adds the "EmailName" as category successfully. If I need to add multiple categories and write the second step statement multiple times then it creates only the last category and overrides the previous categories.

Thanks

Answer 1

Looking for same thing as OP via google and stumbled on this question. It looks like SendGrid C# library now supports multiple categories, so thought I'd add it here in case others stumble here too.

IEnumerable<string> categories = new string[] { "c1", "c2" };
message.Header.SetCategories(categories);

Link to github issue where this was resolved:

• https://github.com/sendgrid/sendgrid-csharp/pull/31