.NET Framework 4.6 and 4.5
Invoked during the transition of a communication object into the opening state.
(in System.ServiceModel.dll) System.ServiceModel.Primitives
Protected Overridable Sub OnOpening
This provides a way to add processing when it is called by the Open and BeginOpen methods.
Supported in: 4.6, 4.5, 4, 3.5, 3.0
.NET Framework Client Profile
Supported in: 4, 3.5 SP1
Portable Class Library
Supported in: Portable Class Library
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8