LINQ where clause with lambda expression having OR clauses and null values returning incomplete results

Question

the problem in short

we have a lambda expression used in the Where clause, which is not returning the \"expected\" result.

quick summary

Answer 1

You are checking Parent properties for null in your delegate. The same should work with lambda expressions too.

List analysisObjects = analysisObjectRepository
        .FindAll()
        .Where(x => 
            (x.ID == packageId) || 
            (x.Parent != null &&
                (x.Parent.ID == packageId || 
                (x.Parent.Parent != null && x.Parent.Parent.ID == packageId)))
        .ToList();