Hi Not sure why this is happening - I was trying a spurious example and the aforementioned exception is thrown. var query13 = from p in db.Products select p.ProductName; var query14 = from c in db.Customers select c.ContactName; if (!query13.SequenceEqual(query14)) { Console.WriteLine("OMG, the list of product names doesn't equal the list of contact names!"); } Am I doing something wrong here? Chris
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