object obj = db
    .CalculateWebApplicationAvailability(dateFrom, dateTo, item, userID)
    .Select(sel =>
    {
        dynamic expando = new ExpandoObject();
        expando.id = sel.AppID;
        expando.order = sel.Order;
        expando.name = sel.AppName;
        expando.availability = new ExpandoObject();
        expando.availability.code = sel.Code;
        expando.availability.value = sel.AvValue;
        return expando;
    })
    .FirstOrDefault();

object obj = slic
    .CalculateWebApplicationAvailability(dateFrom, dateTo, item, userID)
    .Select(sel => new
    {
        id = sel.AppID,
        order = sel.Order,
        name = sel.AppName,
        availability = new 
        {
            code = sel.Code,
            value = sel.AvValue
        }
    })
    .FirstOrDefault();