In .NET Framework 3.5 we released several LINQ providers, including LINQ to SQL which set the bar for a great programming model with LINQ over relational databases.
closed as general reference by RegDwighт♦ Mar 5 at 10:02
This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information. See the FAQ for guidance on how to improve it.
To set the bar means to set a standard. The example you gave means that LINQ to SQL sets the standard for good programming models. In more detail, it means that LINQ to SQL is an example of a good programming model, and that other programming models should be as good as or better than LINQ to SQL.