private static void ReadOrderData(string connectionString)
{
    string queryString = 
        "SELECT OrderID, CustomerID FROM dbo.Orders;";
    using (SqlConnection connection = new SqlConnection(
               connectionString))
    {
        SqlCommand command = new SqlCommand(
            queryString, connection);
        connection.Open();
        SqlDataReader reader = command.ExecuteReader();
        try
        {
            while (reader.Read())
            {
                Console.WriteLine(String.Format("{0}, {1}",
                    reader[0], reader[1]));
            }
        }
        finally
        {
            // Always call Close when done reading.
            reader.Close();
        }
    }
}

var query = (
       from user in session.Linq<User>()
       select user.Name
     ).ToList();

DataTable dt;
var command = new SQLiteCommand(sql, connect);
var adapter = new SQLiteDataAdapter(command);
adapter.Fill(dt);
IEnumerable<DataRow> sequence = dt.AsEnumerable();