How do I use a delegate with WorkflowApplication.OnUnhandledException

Question

WF4 uses 4 Action that I can use to delegate to methods. Like this.

_workflowApplication.Completed = delegate(WorkflowApplicationCompletedEventArgs e) { WorkflowApplicationCompleted(e); };

However there are also 2 Func. I can see how to use them inline but I want them to delegate to a method.

I tried:

_workflowApplication.PersistableIdle = delegate(WorkflowApplicationIdleEventArgs e) { WorkflowApplicationPersistableIdle(e); };

but I have no return statement.

I tried:

_workflowApplication.OnUnhandledException = (returnValue) => WorkflowApplicationOnUnhandledException(e, returnValue);

but e does not resolve.

How can I delegate to a method?

Answer 1

private void SetExceptionHandler(WorkflowApplication app)
{
    app.OnUnhandledException = x => HandleTheUnhandled(x);
}

private UnhandledExceptionAction HandleTheUnhandled(
    WorkflowApplicationUnhandledExceptionEventArgs args)
{
    //some logic
    return UnhandledExceptionAction.Abort;
}

Or

app.OnUnhandledException = x => 
{
    // some logic
    return UnhandledExceptionAction.Abort;
};

Or, if no logic is required,

app.OnUnhandledException = x => UnhandledExceptionAction.Abort;

Lambdas. Learn them. Love them.