How to check for null before I use in linq?

I have an list of objects that contains another object in it.

List<MyClass> myClass = new List<MyClass>();

I want to do some linq like this

myClass.开发者_如何学JAVAWhere(x => x.MyOtherObject.Name = "Name").ToList();

Thing is sometimes "MyOtherObject" is null. How do I check for this?

Simple, just add an AND clause to check if it's not null:

myClass.Where(x => x.MyOtherObject != null && x.MyOtherObject.Name = "Name").ToList();

As of C# 6, you can also use a null conditional operator ?.:

myClass.Where(x => x.MyOtherObject?.Name == "Name").ToList();

This will essentially resolve the Name property to null if MyOtherObject is null, which will fail the comparison with "Name".

Try it online

You can just make your predicate check for null...

myClass.Where(x => (x.MyOtherObject == null) ? false : x.MyOtherObject.Name == "Name").ToList();

I would do something like this:

myClass.Where(x => x.MyOtherObject != null)
       .Where(y => y.MyOtherObject.Name = "Name")
       .ToList();