Post

According to W3 the post method does the following

The POST method is used to request that the origin server accept the entity enclosed in the request as a new subordinate of the resource identified by the Request-URI in the Request-Line. POST is designed to allow a uniform method to cover the following functions:

  - Annotation of existing resources;
  - Posting a message to a bulletin board, newsgroup, mailing list,
    or similar group of articles;
  - Providing a block of data, such as the result of submitting a
    form, to a data-handling process;
  - Extending a database through an append operation.

You can post to a service using the post method and using static, anonymous or dynamic objects.

Lets take our Tree as an example.

Our tree object looks like this.

public class Tree
{
   public int Id { get; set ; }
   public string Genus { get; set; }
}

Now we can post an object to our service like this.

var tree = new Tree(); 
tree.Id = 1; 
tree.Genus = "Fagus";
var http = new HttpClient();
http.Post("url", tree, HttpContentTypes.ApplicationJson);

Or we can do it with an anonymous object like this.

var http = new HttpClient();
http.Post("url", new{Id=1, Genus="Fagus"}, HttpContentTypes.ApplicationJson);

or you can Post a dynamic type.

var tree = new ExpandoObject(); 
tree.Id = 1; 
tree.Genus = "Fagus";
var http = new HttpClient();
http.Post("url", tree, HttpContentTypes.ApplicationJson);

You can choose the contenttype.