How to separate all consecutive Objects using Linq (C#)

Question

I have a List ... MyObject has a propert called LineId (integer)...

So, I need separate all consecutive LineId in List

Answer 1

For good measure, how about a LINQ solution not implemented using LINQ:

public static IEnumerable> GroupConsecutive(
        this IEnumerable source, Func keySelector) {
    if (source == null) throw new ArgumentNullException("source");
    if (keySelector == null) throw new ArgumentNullException("keySelector");

    var comparer = EqualityComparer.Default;
    var grouped = new List();
    using (var iter = source.GetEnumerator()) {
        if (!iter.MoveNext()) yield break;
        grouped.Add(iter.Current);
        var last = iter.Current;
        while (iter.MoveNext()) {
            if (!comparer.Equals(keySelector(iter.Current), keySelector(last))) {
                yield return grouped.AsReadOnly();
                grouped = new List();
            }
            grouped.Add(iter.Current);
            last = iter.Current;
        }
        yield return grouped.AsReadOnly();
    }
}