Get first member that is not ordered correctly

MembersSortAnalyzer.cs

private static ISymbol GetUnorderedMember(List<ISymbol> members)
{
    //I'm just sorting the members by DeclaredAccessibility, then comparing them with the order of
    //the initial members
    var orderedByAccessibility = members.OrderByDescending(m => m.DeclaredAccessibility).ToList();
    for (var i = 0; i < members.Count; i++)
    {
        if (members[i].DeclaredAccessibility != orderedByAccessibility[i].DeclaredAccessibility)
        {
            if (orderedByAccessibility[i].DeclaredAccessibility < members[i].DeclaredAccessibility)
            {
                return members[i];
            }
        }
    }

    return null;
}