C# - How would I return a random enum instead of the enums stored value?

I have a problem with my code but I'm not sure where. I'm attempting to return an enum value from an enum collection/class. However when I try do this, instead of returning the value, it returns a number of the actual enum value.

E.G

thisisamaptype = 5;

would return "5" instead of the Enum name its self.

Is there a way to get the Enum value from the associated number provided by the method?

    Random rnd = new Random();
    public static MapTypes GetMapType(string Type)
    {
        switch (Type.ToLower())
        {
            default:
            case "default":
                return (MapTypes)(rnd.Next(1,Enum.GetNames(typeof(MapTypes)).Length)); 
        }
    }