DataTable does not contain definition for AsEnumerable

Question

Using linq to query a datatable returns the following error: CS0117: \'DataSet1.map DataTable\' does not contain a definition for \'AsEnumerable\'

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Answer 1

I got this error message: 'System.Data.DataTable' does not contain a definition for 'AsEnumerable' and no extension method 'AsEnumerable' accepting a first argument of type 'System.Data.DataTable' could be found (are you missing a using directive or an assembly reference?)

Added

using System.Data;

Added "System.Data.DataSetExtensions" to the References section. It resolved the problem.