I am now trying to declare a variable with anonymous type and I can not figure out how to declare this variable correctly. The showed declaration doesn't help me

var query = dtBookings.AsEnumerable().Select(c => new
    {
       booking_id = c.Field<Decimal>("booking_id"),
       lname = c.Field<String>("lname"),
       start_time = c.Field<DateTime?>("start_time"),
       end_time = c.Field<DateTime?>("end_time"),
       flex_tspan = c.Field<Boolean>("flex_tspan"),
       layer = c.Field<Byte>("layer"),
       backcolor = c.Field<Int32>("backcolor"),
       forecolor = c.Field<Int32>("forecolor"),
       clip_loc = c.Field<Boolean>("clip_loc"),
       clip_sp = c.Field<String>("clip_sp"),
       display_msg = "#Slots: " + c.Field<Int16>("num_addit").ToString() + " " + c.Field<String>("display_msg"),
       isnotes = c.Field<Boolean>("isnotes"),
       bookingType = "POD"
    });