The type or namespace name 'BodyOperationParameter' could not be found - C#

Формулировка задачи:

пишет ошибку связаную с BodyOperationParamete в строке

ar query = ctx.Execute<ScoreResult>(acitionUri, "POST", true, new BodyOperationParameter("Text", TextBox1.Text));

Severity Code Description Project File Line Suppression State Error CS0246 The type or namespace name 'BodyOperationParameter' could not be found (are you missing a using directive or an assembly reference?) ConsoleApplication1 C:\Users\Ярослав\Desktop\ConsoleApplication1\ConsoleApplication1\Program.cs 44 Active хотя я using System.Data.Services.Client; добавил .....

Решение задачи: «The type or namespace name 'BodyOperationParameter' could not be found»

textual
                            Листинг программы 
                        
                            using System.Data.Services.Client;