How to force LINQ Sum() to return 0 while source collection is empty

Question

Basically when I do the following query, if no leads were matched the following query throws an exception. In that case I\'d prefer to have the sum equalize 0 rather than an

Answer 1

I prefer to use another hack:

double earnings = db.Leads.Where(l => l.Date.Day == date.Day
                                      && l.Date.Month == date.Month
                                      && l.Date.Year == date.Year
                                      && l.Property.Type == ProtectedPropertyType.Password
                                      && l.Property.PropertyId == PropertyId)
                          .Sum(l => (double?) l.Amount) ?? 0;