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copied!<p>I'm not certain I'm following what you're doing but I'd take a look at an event-based notification system for calling your <code>Notify</code> method from your file access work class. I'm assuming your file access work class is called <code>FileManager</code> and that it's an instance class.</p> <p>First, create a custom <code>EventArg</code> class to store the data you want to relay in the notifications coming out of your <code>FileManager</code> class. Create a <code>DoNotify</code> event in your <code>FileManager</code> class that uses this custom <code>EventArg</code> class and call the event (after populating it with your status data) when you wish to update the <code>Notify</code> method.</p> <p>When you instantiate a <code>FileManager</code> object subscribe to the <code>DoNotify</code> event and in its handler call your <code>Notify</code> method:</p> <pre><code>public class FileManager { public event EventHandler<NotifyEventArgs> DoNotify; private void DoSomethingInterestingMethod() { //... // Let listeners know something interesting happened. var doNotify = DoNotify; if (doNotify != null) { doNotify(this, new NotifyEventArgs(errorLevel, message)); } //... } } public class NotifyEventArgs : EventArgs { public NotifyEventArgs(int errorLevel, string statusMessage) { ErrorLevel = errorLevel; StatusMessage = statusMessage; } public int ErrorLevel { get; private set;} public string StatusMessage { get; private set; } } </code></pre> <p>And then on your BackgroundWorker thread (in <code>DoWork</code>(?)) create one ore more <code>FileManager</code> objects and subscribe to the <code>DoNotify</code> event:</p> <pre><code>var fm = new FileManager(); fm.DoNotify += FileManager_Notify; </code></pre> <p>And in the DoNotify handler call your <code>Notify</code> method:</p> <pre><code>void FileManager_Notify(object sender, NotifyEventArgs e) { Notify(e.ErrorLevel, e.StatusMessage); } </code></pre> <p>I'm not entirely sure of some of your implementation details so I hope I've made myself clear enough to allow you to evaluate this approach and decide if it's right for you.</p>

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