How to group consecutive similar items of a collection?

Question

Consider the following collection.

• True
• False
• False
• False
• True
• True
• False
• False

I

Answer 1

last = null;
foreach (var option in list)
{
   if (last != option)
      newlist.Add(new Group(option, new[]));
   newlist.Last().Add(option);
   last = option;
}