Recently we moved our projects to a new TFS server. This means that all workspaces link to the old TFS, and you will get the error message "The path [path] is already mapped in workspace [workspace]" when you try to add a new reference to a project you've already worked on. I keep running into this every once in a while, because we develop from virtual machines and we have different ones for different projects. I also keep forgetting what to do, so this is partly a message to self.

You can solve this by opening the Visual Studio command prompt and typing:

tf workspaces /remove:[projectname]

If you want to remove all of them (which is the case when switching to a new TFS), you can use a wildcard, like this:

tf workspaces /remove:*

Thanks to Gergely Orosz's post on the topic.

As an MVP I've had the fortune of being involved early in the VS2010 beta. Because the number of beta participants is relatively small in the beginning, Microsoft is able to have a much more interaction with the testing population and excplicitly goes out for feedback and discussion of some of the features. VS2010 is a great example of Microsoft putting that to good use. Something simple like the Add Reference dialog has improved greatly in VS2010, as Scott Guthrie explains here. I remember the discussion about it, because there were quite a few different ideas about what should come up first and what you use the most. As you can see, Microsoft decided that the Projects tab is the most likely to be used first, so I'm assuming most developers agree on that (I do anyway).

BTW, the rest of the series on VS2010 and .NET 4.0 provides a good overview of what you can expect of the new release.

I will be speaking at VSLive! again, this time in Dallas from 8 until 11 December. I'll be doing the following sessions:

• Introduction to ASP.NET Dynamic Data (Tuesday 9 December, 11:15 AM)
• POX/REST Strategies with WCF (Thursday 11 December, 1:45 PM)
• Understanding Transactions in WCF (Thursday 11 December, 4:45 PM)

VSLive! is a very nice and relaxed event with great content. So it's a great opportunity to learn new stuff and new people. If you want to attend the Dallas show and see me speak, you can get a $300 discount by entering the discount code SPVAN. I hope to see you there.

JavaScript Intellisense in Visual Studio 2008 is een prachtig stukje demoware. Het lijkt op het eerste gezicht allemaal heel aardig te werken... totdat je er zelf echt mee aan de slag gaat. En met "echt" bedoel ik voor productie, niet die leuke demotjes. Dan loop je tegen zoveel problemen aan dat je wat mij betreft moet concluderen dat het (op z'n zachts gezegd) "nog niet biedt wat je ervan zou verwachten". Ik heb al heel wat tijd verspijkerd om de comments van mijn scripts goed te krijgen, zodat VS ermee overweg kan. Niet zelden zonder het gewenste resultaat. Deze blogpost van OpenSource Connections geeft een goede opsomming van wat ik bedoel.