ReleaseInstanceMode Enumeration
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ReleaseInstanceMode Enumeration

 

Specifies when the system recycles the service object in the operation invocation process.

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

public enum ReleaseInstanceMode

Member nameDescription
AfterCall

Recycles the object subsequent to the completion of the operation.

BeforeAndAfterCall

Recycles the object prior to calling the operation and subsequent to the completion of the operation.

BeforeCall

Recycles the object prior to calling the operation.

None

Recycles the object according to the InstanceContextMode value.

Use the ReleaseInstanceMode with the ReleaseInstanceMode property to inform Windows Communication Foundation (WCF) that the current service object must be recycled at a particular point in the invocation process. The default behavior is to recycle a service object according to the InstanceContextMode value.

The following example code shows the use of ReleaseInstanceMode to recycle service objects both before and after a call.

class SampleService : ISampleService
{
  private Guid id;
  private string session;

  public SampleService()
  {
    id = Guid.NewGuid();
    session = OperationContext.Current.SessionId;
    Console.WriteLine("Object {0} has been created.", id);
    Console.WriteLine("For session {0}", session);
  }
  [OperationBehavior(
          ReleaseInstanceMode=ReleaseInstanceMode.BeforeAndAfterCall
  )]
  public string  SampleMethod(string msg)
  {
    Console.WriteLine("The caller said: \"{0}\"", msg);
    Console.WriteLine("For session {0}", OperationContext.Current.SessionId);
    return "The service greets you: " + msg;
  }

  ~SampleService()
  {
    Console.WriteLine("Object {0} has been destroyed.", id);
    Console.WriteLine("For session {0}", session);
  }
}

.NET Framework
Available since 3.0
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