Remove duplicates while merging lists using Union in LINQ

Question

I am trying to merge two lists using list.Union in LinqPad but I can\'t get it to work and wanted to check my understanding is correct.

Giv

Answer 1

Just want to leave this here for anyone that still couldn't get it. I found this article super helpful about the compare class that inherits from IEqualityComparer http://alicebobandmallory.com/articles/2012/10/18/merge-collections-without-duplicates-in-c