List.Sort in C#: comparer being called with null object

Question

I am getting strange behaviour using the built-in C# List.Sort function with a custom comparer.

For some reason it sometimes calls the comparer class\'s Compare meth

Answer 1

Marc's answer is useful. I agree with him that the NullReference is due to calling CompareTo on a null property. Without needing an extension class, you can do:

mylist.Sort((x, y) => 
      (Comparer.Default.Compare(x.SomeProp, y.SomeProp)));

where SomePropType is the type of SomeProp