AppDomain and MarshalByRefObject life time : how to avoid RemotingException?

Question

When a MarshalByRef object is passed from an AppDomain (1) to another (2), if you wait 6 mins before calling a method on it in the second AppDomain (2) you will get a Remoti

Answer 1

You could try a serializable singleton ISponsor object implementing IObjectReference. The GetRealObject implementation (from IObjectReference should return MySponsor.Instance when context.State is CrossAppDomain, otherwise return itself. MySponsor.Instance is a self-initializing, synchronized (MethodImplOptions.Synchronized), singleton. The Renewal implementation (from ISponsor) should check a static MySponsor.IsFlaggedForUnload and return TimeSpan.Zero when flagged for unload/AppDomain.Current.IsFinalizingForUnload() or return LifetimeServices.RenewOnCallTime otherwise.

To attach it, simply obtain an ILease and Register(MySponsor.Instance), which will be transformed into the MySponsor.Instance set within the AppDomain due to the GetRealObject implementation.

To stop sponsorship, re-obtain the ILease and Unregister(MySponsor.Instance), then set the MySponsor.IsFlaggedForUnload via a cross-AppDomain callback (myPluginAppDomain.DoCallback(MySponsor.FlagForUnload)).

This should keep your object alive in the other AppDomain until either the unregister call, the FlagForUnload call, or AppDomain unload.