How do I add header data in HttpClient/PostAsync

Question

using

            var values = new Dictionary<string, string>
            {
               { "thing1", "hello" },
               { "thing2", "world" }
            };
            var content = new FormUrlEncodedContent(values);
            var response = await client.PostAsync("http://www.example.com/recepticle.aspx", content);

            var responseString = await response.Content.ReadAsStringAsync();

I have not seen an examnle with adding headers, only data values

Answer 1

FormUrlEncodedContent class inherits from HttpContent , which contains the Headers property, which you can use to add/remove/set the http headers.

The Headers property is an instance of HttpContentHeaders , so check that last class' docs to see the available methods and properties you can use to alter the headers you want.

Example:

var content = new FormUrlEncodedContent(values);
content.Headers.Add("MyHeader", "My Value");
content.Headers.ContentType = "application/pdf";