Question

I have this block of code inside another LINQ statement.

 VideoLinks = (from video in m.VideoLinks.DefaultIfEmpty(new VideoGallery())
                                              orderby video.CreatedDate
                                              select new VideoGallery()
                                              {
                                                  Source = video.Source,
                                                  Type = video.Type,
                                                  Links = video.Links,
                                                  Title = video.Title
                                              }).ToList()

unfortunately if dont use DefaultIfEmpty its through me an exception. If I use DefaultIfEmpty i give count as 1 for videolinks even if m.VideoLinks is null.

So now how can avoid getting count 1 if m.VideoLinks is null

Answer 1

This looks like you are using linq-to-objects, so you should add a where video != null

VideoLinks = (from video in m.VideoLinks
              where video != null
              orderby video.CreatedDate
              select new VideoGallery()
              {
                Source = video.Source,
                Type = video.Type,
                Links = video.Links,
                Title = video.Title
              }).ToList()