How would you get an array of Unicode code points from a .NET String?

Question

I have a list of character range restrictions that I need to check a string against, but the char type in .NET is UTF-16 and therefore some characters become wa

Answer 1

This answer is not correct. See @Virtlink's answer for the correct one.

static int[] ExtractScalars(string s)
{
  if (!s.IsNormalized())
  {
    s = s.Normalize();
  }

  List chars = new List((s.Length * 3) / 2);

  var ee = StringInfo.GetTextElementEnumerator(s);

  while (ee.MoveNext())
  {
    string e = ee.GetTextElement();
    chars.Add(char.ConvertToUtf32(e, 0));
  }

  return chars.ToArray();
}

Notes: Normalization is required to deal with composite characters.