DataSource for Entity Framework in WPF
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    Query Performance Sample Application (LiveLinqQueries)
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    The querying demo shows all three LiveLinq varieties: LiveLinq to Objects, LiveLinq to DataSet and LiveLinq to XML, side by side, performing the same queries on the same data. The data are the good old Northwind Customers and Orders tables, in the three incarnations: custom object collections, a data set and XML, respectively.

    The demo contains various queries, some with a parameter. For each query it shows the code, how that query is formulated in each of the three LiveLinq varieties. Every query is implemented in two different forms:

    ·         Programmatic index search; that is, code without LINQ, directly using indexes for search, and

    ·         LINQ query syntax.

    These two LiveLinq implementations are compared with a standard LINQ implementation shown along with them. For each query, the demo shows the speedup factor: how much faster the LiveLinq implementation is compared with the standard LINQ one.