What is the advantage of using Path.Combine over concatenating strings with '+'?

Question

I don\'t quite see the difference.

What could Path.Combine do better than perfectly working string concatenation?

I guess it\'s doing something

Answer 1

Path.Combine uses the Path.PathSeparator and it checks whether the first path has already a separator at the end so it will not duplicate the separators. Additionally, it checks whether the path elements to combine have invalid chars.