Migrating a delphi application to C#.NET

Question

I'm in the process of migrating a delphi application to C#.NET but when I add a dataset to my project and I select all the tables I will need to use, my computer slows down significantly and I end up with a out of memory error. So what are the best practices when your application is going to be using a large amount of tables and Stored Procedures.

Thanks,
Donnelly