asp.net core getting null date from linq query

Question

I am using a linq query to get my data from table and I am applying a left join but I couldn't find a way to handle empty dates. Example below

 

CraftWorkViews = await (from a in _context.WOMains.Where(s => s.OrgID == orgid)
     join b in _context.WOPlanners.Where(s => s.Craft == craftid) on a.WOMainID equals b.WOMainID into Temp1
     from c in Temp1
     join d in _context.WOPlannerSCHs on c.WOMainID equals d.WOMainID into Temp2
     from e in Temp2
            select new CraftWorkView
            {
                   WONumber = c == null ? 0 : c.WONumber,
                   Subsequent = c == null ? 0 : c.WONumberS,
                   Activity = c == null ? " " : c.Activity,
                   StartDate = e == null ? ???? : e.StartDateP,
                   EndDate = e == null ? ???? : e.DueDateP,
                   CompletionDate = e == null ? ???? : e.CompDateP

              }).ToListAsync();