https://learn.microsoft.com/en-us/dotnet/api/system.servicemodel.dispatcher.icallcontextinitializer?view=netframework-4.8.1&redirectedfrom=MSDN
ICallContextInitializer Interface (System.ServiceModel.Dispatcher) | Microsoft Learn
Defines the methods that enable the initialization and recycling of thread-local storage with the thread that invokes user code.
interfacesystemdispatchermicrosoftlearn