DataSource for Entity Framework in WPF
LiveLinq / How to use LiveLinq / How to Query Collections with LiveLinq / Using ADO.NET Data Collections (LiveLinq to DataSet)
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    Using ADO.NET Data Collections (LiveLinq to DataSet)
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    ADO.NET DataTable can also be used in LiveLinq, for example:

     

    C#
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    CustomersDataTable customers = ...
var query =
  from c in customers.AsIndexed() where c.City == "London" select c;

     

     For that, you’ll need to add the following to your source file:

    C#
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    using C1.LiveLinq.AdoNet;

     The AsIndexed() used will be  C1.LiveLinq.AdoNet.AdoNetExtensions.AsIndexed|keyword=AsIndexed Method (DataTable). It is specifically optimized for data in ADO.NET DataSets.