When I first started to use the new Dataset designer, the feature that I miss the most is the ability to review the generated .cs (or .vb) code. In VS.NET 2005 this generated file is no longer located in project directory, but rather it is located in some temporary one. The easiest way, which I have found until now, to see this file is to open Class View and double click on the dataset class. This will open the partial class of the generated dataset from the temporary directory.