public void CreateChallenge(string Name, List <string> Splits)
{
if (Name == null || Splits == null)
{
throw new ArgumentNullException();
}
if (Splits.Count == 0)
{
throw new ArgumentException();
}
Challenges.CreateChallenge(Name, Splits);
challengeList = Challenges.GetChallenges();
CurrentChallenge = Name;
// We changed some of our public properties.
NotifyPropertyChanged("ChallengeList");
}