Datatable select with multiple conditions

Question

I have a datatable with 4 columns A, B, C and D such that a particular combination of values for column A, B and C is unique in the datatable.

Objective:

Answer 1

Do you have to use DataTable.Select()? I prefer to write a linq query for this kind of thing.

var dValue=  from row in myDataTable.AsEnumerable()
             where row.Field<int>("A") == 1 
                   && row.Field<int>("B") == 2 
                   && row.Field<int>("C") == 3
             select row.Field<string>("D");