What purposes should I use class StringContent for?

StringContent class creates a formatted text appropriate for the http server/client communication. After a client request, a server will respond with a HttpResponseMessageand that response will need a content, that can be created with the StringContent class.

Example:

 string csv = "content here";
 var response = new HttpResponseMessage();
 response.Content = new StringContent(csv, Encoding.UTF8, "text/csv");
 response.Content.Headers.Add("Content-Disposition", 
                              "attachment; 
                              filename=yourname.csv");
 return response;

In this example, the server will respond with the content present on the csv variable.