This is one technique of calling or consuming rest webservice in asp.net c#
var client = new RestClient("url");
var request = new RestRequest(Method.POST);
request.AddHeader("content-type", "application/json");
request.AddParameter("application/x-www-form-urlencoded",
"type=password& user_id=test@gmail.com",ParameterType.RequestBody);
IRestResponse response = client.Execute(request);