How to name this data structure

I have this class in C#

1.A private DataTable. This datatable is initialized by a database query.

2.get(string filter) method, this method do DataTable.select(filter) on the private DataTable. And throw exception if it found 0 or more than 1 rows. Otherwise, it return the only row that it foun开发者_如何学编程d.

I couldn't think of a proper name for it. Any comment is appreciated.

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A UniqueRowSelector or SingleRowSelector? Because it can only return one row.

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getSingleRowByName

Replace "Name" with whatever the string parameter is representative of.

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i think DatabaseTable describes it pretty well