Cacher is the code snippet organizer for pro developers

internal static class IEnumerablePartitionExtensions
{
  public static IEnumerable<ICollection<T>> PartitionByPredicate<T>(this IEnumerable<T> seq, Func<T, T, bool> split)
	{
		var buffer = new List<T>();
		foreach (var x in seq)
		{
			if (buffer.Any() && split(buffer.Last(), x))
			{
				yield return buffer;
				buffer = new List<T>();
			}
			buffer.Add(x);
		}
	
		if (buffer.Any())
			yield return buffer;
	}

	public static IEnumerable<ICollection<T>> PartitionByCount<T>(this IEnumerable<T> seq, int count)
	{
		var buffer = new List<T>(count);
		foreach (var x in seq)
		{
			if (buffer.Count == count)
			{
				yield return buffer;
				buffer = new List<T>(count);
			}
			buffer.Add(x);
		}
		if (buffer.Any()) yield return buffer;
	}
}