Compare two List objects for equality, ignoring order [duplicate]

Answer 1

If you don't care about the number of occurrences, I would approach it like this. Using hash sets will give you better performance than simple iteration.

var set1 = new HashSet(list1);
var set2 = new HashSet(list2);
return set1.SetEquals(set2);

This will require that you have overridden .GetHashCode() and implemented IEquatable on MyType.