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DeliveryRequirementsAttribute Class

Specifies the feature requirements that bindings must provide to the service or client implementation.

Namespace: System.ServiceModel
Assembly: System.ServiceModel (in system.servicemodel.dll)

[AttributeUsageAttribute(AttributeTargets.Class|AttributeTargets.Interface, AllowMultiple=true)] 
public sealed class DeliveryRequirementsAttribute : Attribute, IContractBehavior, IContractBehaviorAttribute
/** @attribute AttributeUsageAttribute(AttributeTargets.Class|AttributeTargets.Interface, AllowMultiple=true) */ 
public final class DeliveryRequirementsAttribute extends Attribute implements IContractBehavior, IContractBehaviorAttribute
AttributeUsageAttribute(AttributeTargets.Class|AttributeTargets.Interface, AllowMultiple=true) 
public final class DeliveryRequirementsAttribute extends Attribute implements IContractBehavior, IContractBehaviorAttribute
Not applicable.

Use the DeliveryRequirementsAttribute to instruct Windows Communication Foundation (WCF) to confirm that the binding provides the features required by the service or client implementation. If a DeliveryRequirementsAttribute attribute is detected when a service description is loaded from an application configuration file or built programmatically in code, WCF validates the configured binding and supports all the features that the attribute specifies. For example, your service may require the bindings to support queuing. Using DeliveryRequirementsAttribute allows WCF to confirm that the following requirements are met:

The DeliveryRequirementsAttribute attribute is applied to a class, which can implement any number of service contract interfaces. DeliveryRequirementsAttribute can be applied to all the contracts the class implements or to only one of them. The attribute can be applied to a class more than once.

using System;
using System.ServiceModel;

[ServiceContract]
interface ICalculatorService
{
  [OperationBehavior()]
  int Add(int a, int b);  

  [OperationContract]
  int Subtract(int a, int b);
}

[DeliveryRequirementsAttribute(
  QueuedDeliveryRequirements=QueuedDeliveryRequirementsMode.NotAllowed,
  RequireOrderedDelivery=true
)]
class CalculatorService: ICalculatorService
{
  public int Add(int a, int b)
  {
    Console.WriteLine("Add called.");
    return a + b; 
  }
  
  public int Subtract(int a, int b)
  {
    Console.WriteLine("Subtract called.");
    return a - b;
  }
  
  public int Multiply(int a, int b)
  {
    return a * b;
  }
}

System.Object
   System.Attribute
    System.ServiceModel.DeliveryRequirementsAttribute

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0

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