Question

In one of the WCF tutorials, I saw the following sample code:

Dim service as ...(a WCF service )

try

   ..

   service.close()

catch ex as Exception()
  ... 

   service.abort()

end try

Is this the correct way to ensure that resources (i.e. connections) are released even under error conditions?

Answer 1

I’ve had good luck with this model:

Dim service As New MyService()
Dim closed As Boolean = False
Try
    service.Open()
    If Not service.State = ServiceModel.CommunicationState.Opened Then
        ''Handle a not-opened state here
    End If
    service.MyMethod()
    service.Close()
    closed = true
Catch ex As Exception
    ''Handle errors here
Finally
    If Not closed Then
        service.Abort()
    End If
End Try
service = Nothing