The Add Reference dialog has been the biggest punching bag for Visual Studio detractors. It’s always been extremely slow and annoying, and pretty much every developer has felt the dread associated with knowing you’re going to have to add a reference to a .NET project.
So, with Visual Studio 2010, this was supposed to have been one of the areas of focus. My initial reaction was that the tweaks made here made a huge difference, and actually made the dialog usable.
Well, I have to say, my initial reaction was incredibly wrong. Yeah, the changes made a huge difference, but not for the better.
The dialog now displays nearly instantaneously. If you’re adding a reference to a project or by browsing to an assembly on disk, then the changes are going to make your heart sing. However, if you’re attempting to add a reference from the list of known assemblies, well, the old dread holds nothing to the new feeling of pure doom.
See, by loading the list asynchronously, populating the UI with every item as it’s found, they’ve actually made it take longer to load the list. Worse, because the UI is updated with every item found, it’s not really usable until the entire list is loaded. There’s nothing more frustrating than being presented with a long list of items, inviting you to scroll to locate the item you need, only to have the scroll bar jump around like a Mexican jumping bean as new items are constantly being added. This behavior is especially vexing because you don’t know when the list is finally fully loaded, and since it takes longer to load then it used to, you’re always frustrated by the jerky UI.
This is so frustrating, because this is a problem that’s really easy to solve. Loading asynchronously is the right choice… but this could be done as soon as the IDE is opened and the results cached. The list should only be populated once all of the items have been added to the cache. The user would then be able to refresh this cache if, in the corner case, there were some change to the actual assemblies that would be available. Problem solved. The user will rarely have to wait for this stupid dialog, and will never be annoyed by an unusable UI.
Boy, I hope they fix this before shipping. :(