C# - Getting List<byte> reference index - linq

Question

I have a List>
List<List<Byte>> bytes = new List<List<Byte>>()
{
new List<Byte> {1, 1, 2, 3, 4}, // index 0 is original
new List<Byte> {0, 0, 2, 4, 1},
new List<Byte> {1, 2, 2, 1, 1},
new List<Byte> {1, 0, 2, 2, 2}
};
and the first List is original. Then I sort my List, and I have to find my original List index.
bytes:
[0] = {0, 0, 2, 4, 1}
[1] = {1, 0, 2, 2, 2}
[2] = {1, 1, 2, 3, 4} // here is that index
[3] = {1, 2, 2, 1, 1}
One guy suggested me to use reference on first not sorted List then sort List and use ReferenceEqual, but this doesn't work for me. Am I doing something wrong by setting reference or it doesn't work on List? How could I get the index of original in sorted array? P.S I'm sorting with OrderBy and IComparer.
This is how I try to make reference:
List<byte> reference = new List<byte>(bytes[0]);

Answer 1

This is how I try to make reference:
List<byte> reference = new List<byte>(bytes[0]);
That's not the right way to make a reference, because you make a copy by calling a constructor of List<byte>. The copy of bytes[0] is not present in bytes, so you wouldn't be able to find it by checking reference equality.
This is how you should do it:
List<byte> reference = bytes[0];
Now reference references the list that is at position zero before sorting, so you should be able to find its index by using reference equality.