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 Enumeration 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.

 Friend Class SampleService
  Implements ISampleService
Private id As Guid
Private session As String

Public Sub New()
  id = Guid.NewGuid()
  session = OperationContext.Current.SessionId
  Console.WriteLine("Object {0} has been created.", id)
  Console.WriteLine("For session {0}", session)
End Sub
<OperationBehavior(ReleaseInstanceMode:=ReleaseInstanceMode.BeforeAndAfterCall)> _
Public Function SampleMethod(ByVal msg As String) As String Implements ISampleService.SampleMethod
  Console.WriteLine("The caller said: ""{0}""", msg)
  Console.WriteLine("For session {0}", OperationContext.Current.SessionId)
  Return "The service greets you: " & msg
End Function

Protected Overrides Sub Finalize()
  Console.WriteLine("Object {0} has been destroyed.", id)
  Console.WriteLine("For session {0}", session)
End Sub
 End Class

.NET Framework
Available since 3.0
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