public static void SeekFromEnd()
{
using var dest = new MemoryStream();
using var src = new ReadOnlySequence<byte>(data).AsStream();
Equal(data.Length - 1, src.Seek(-1L, SeekOrigin.End));
src.CopyTo(dest);
Equal(1L, dest.Length);
Equal(data[^1], dest.ToArray()[0]);