/// <summary>
/// 錯誤信息實體類（用于錯誤契約FaultContract）
/// </summary>
[DataContract]
public class FaultMessage
{
    /// <summary>
    /// 錯誤信息
    /// </summary>
    [DataMember]
    public string Message { get; set; }

    /// <summary>
    /// 錯誤代碼
    /// </summary>
    [DataMember]
    public int ErrorCode { get; set; }
}

[ServiceContract]
public interface IHello
{
    [OperationContract]
    [FaultContract(typeof(FaultMessage))]
    void HelloFaultExceptionGeneric();
}

/// <summary>
/// Hello類
/// </summary>
public class Hello : IHello
{
    /// <summary>
    /// 拋出FaultException<T>異常
    /// </summary>
    public void HelloFaultExceptionGeneric()
    {
        throw new FaultException<FaultMessage>(new FaultMessage { Message = "拋出FaultException<T>異常", ErrorCode = -1 }, "為了測試FaultException<T>用的");
    }
}

protected void btnHelloFaultExceptionGeneric_Click(object sender, EventArgs e)
{
    ExceptionService.HelloClient proxy = new ExceptionService.HelloClient();
    try
    {
        proxy.HelloFaultExceptionGeneric();
    }
    catch (System.ServiceModel.FaultException<ExceptionService.FaultMessage> ex)
    {
        lblMsg.Text = string.Format("錯誤代碼：{0}；錯誤信息：{1}；錯誤原因：{2}",
            ex.Detail.ErrorCode.ToString(),
            ex.Detail.Message,
            ex.Reason.ToString());
    }
    finally
    {
        proxy.Close();
    }
}