Sort a List by enum where enum is out of order

Question

I have a List of messages. Each message has a type.

public enum MessageType
{
    Foo = 0,
    Bar = 1,
    Boo = 2,
    Doo = 3
}

The enum

Answer 1

No need to have the mapping. This should give you the list and order based on the enum. You don't have to modify anything even when you change the enum's order or and new items...

var result = (from x in tempList
              join y in Enum.GetValues(typeof(MessageType)).Cast()
              on x equals y
              orderby y
              select y).ToList();