// PUT api/expenses/5
public void Put(int id, [FromBody]Expensenote exUpdate)
{
    expensenote ex = (from e in db.expensenotes
                      where e.ID == id
                      select e).FirstOrDefault();
    if (ex == null)
    {
        //return Request.CreateErrorResponse(HttpStatusCode.NotFound, "Request was not found.");
    }
    else
    {
        foreach (Expensenotedaily d in exUpdate.dailyExpenses)
        {
            var daily = ex.expensenotedailies.SingleOrDefault(da => da.ID == d.ID);

            daily.city = d.city;
            daily.dailyallowance = d.dailyallowance;

            foreach (Expenseindividual i in d.individualExpenses)
            {
                expenseindividual individual = daily.expenseindividuals.SingleOrDefault(ind => ind.ID == i.ID);
                if (i.value == 0)
                {
                    if (!(individual == null))
                    {
                        db.expenseindividuals.Remove(individual);
                    }
                }
                else
                {
                    if (!(individual == null))
                    {
                        individual.value = i.value;
                    }
                    else
                    {
                        expenseindividual newInd = db.expenseindividuals.Create();
                        newInd.typecode_ID = i.expensetypeID;
                        newInd.daily_ID = daily.ID;
                        newInd.typecode = db.typecodes.SingleOrDefault(t => t.ID == i.expensetypeID);
                        newInd.expensenotedaily = daily;
                        newInd.value = i.value;
                        newInd.creditcard = false;
                        db.expenseindividuals.Add(newInd);
                    }
                }
            }
        }
        db.SaveChanges();
    }
}

public partial class expenseindividual
{
    public expenseindividual()
    {
        this.supplementalinfoes = new HashSet<supplementalinfo>();
    }

    public int ID { get; set; }
    public double value { get; set; }
    public bool creditcard { get; set; }
    public int daily_ID { get; set; }
    public int typecode_ID { get; set; }

    public virtual expensenotedaily expensenotedaily { get; set; }
    public virtual typecode typecode { get; set; }
    public virtual ICollection<supplementalinfo> supplementalinfoes { get; set; }
}

expensenote ex = (from e in db.expensenotes
                              where e.ID == id
                              select e).FirstOrDefault();
            if (ex == null)
            {
                //return Request.CreateErrorResponse(HttpStatusCode.NotFound, "Request was not found.");
            }
            else
            {