[C#/WCF] ServiceContractAttribute 클래스 사용하기

using System.ServiceModel;

/// <summary>
/// 서점 인터페이스
/// </summary>
[ServiceContract(Namespace="http://company.com/bookstore")]
public interface IBookStore
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Method

    #region 주문하기 - Order(userID, isbn, amount)

    /// <summary>
    /// 주문하기
    /// </summary>
    /// <param name="userID">사용자 ID</param>
    /// <param name="isbn">ISBN</param>
    /// <param name="amount">수량</param>
    /// <returns>주문 ID</returns>
    [OperationContract]
    int Order(string userID, string isbn, int amount);

    #endregion

    #region 취소하기 - Cancel(orderID)

    /// <summary>
    /// 취소하기
    /// </summary>
    /// <param name="orderID">주문 ID</param>
    /// <returns>처리 결과</returns>
    bool Cancel(int orderID);

    #endregion
}