The following sample code for the Navigation Back action is an InlineAction that instructs the FormsManager to close the current screen and navigate to the previous screen:
Sybase.UnwiredPlatform.Windows.Action.Action action0 = Sybase.UnwiredPlatform.Windows.Action.ActionFactory.CreateInlineAction(
delegate(Object[] args,out string message )
{
FormBase.FormsManager.CloseForm();
message = "";
return false;
}
);
action0.Execute();