RestSharp Add object as parameter to the request in C Sharp

Question: RestSharp Add object as parameter to the request in C Sharp

Answer

var client = new RestClient("https://website.com/api/");
var request = new RestRequest("addBook", Method.POST);
var book = new { name = "My Book", totalPage = 30 };
request.AddParameter("book", book, ParameterType.RequestBody);