public HashSet <int> GetIndexOfDifferences()
{
return(BoxIdOne.Zip(BoxIdTwo, (c1, c2) => c1 == c2)
.Select((isMatch, i) => new { IsMatch = isMatch, Index = i })
.Where(m => !m.IsMatch)
.Select(m => m.Index)
.ToHashSet());
}
public string GetMatchingString()
{
var differences = GetIndexOfDifferences();
return(new string(BoxIdOne
.Select((letter, i) => new { Letter = letter, Index = i })
.Where(l => !differences.Contains(l.Index))
.Select(l => l.Letter)
.ToArray()));
}
