Why am I not getting .CopyToDataTable() in Linq Query()

Question

This following code example is borrowed from MSDN here. I am not getting query.CopyToDataTable() available in my code. (see the commented line in my following code).

Answer 1

I think that's because your creating a anonymous type to hold the Field object. Try this:

    var query = from SPhysician in dtPhysicianServer.AsEnumerable()
                join CPhysician in dtPhysicianClient.AsEnumerable()
                on SPhysician.Field("PhysicianNumber") equals
                    CPhysician.Field("PhysicianNumber")
                select CPhysician;

    DataTable FilterDt = query.CopyToDataTable();

Definition of CopyToDataTable:

public static DataTable CopyToDataTable(
    this IEnumerable source
)
where T : DataRow

So what you select with the query must be of type IEnumerable where T extends DataRow