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

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)
     .Select(l => l.Amount)
     .ToList()
     .Sum();