public void Get() { IRestRequest request = new RestRequest("http://localhost:3508"); request.AddPath("/api/values"); request.AddContentType("application/json"); request.AddDataFormat(DataFormat.Json); request.AddMethod(Method.GET); request.AddBasicAuthentication("abc", "123"); request.AddWebHeaderCollection("CustomerId", "1"); IRestClient client = new RestClient(request); var response = client.Execute <object>(); Assert.IsTrue(response.StatusCode == HttpStatusCode.OK); }