I can vouch for the Telerik tool. This is the most effective (free) converter I have used. Still don't understand why it can't work out that C# uses square brackets for indexers and VB.NET uses normal brackets. I always have to fix these manually. Also watch out for array declaration. In C# you declare an array according to the number of items in it, in VB.NET you specify the upper boundary. This can cause difficult to find run-time errors if you don't look out for it.

Nice of Microsoft to admit that VS 2005 "has some issues under VISTA". Do you think that they will admit that VS2005 has some issues full stop. I have never used a less stable "released" application in my entire life. The entire suite is still beta software on XP, never mind on VISTA. And having to wait another 4 months for the service pack? Makes you want to write JAVA!!