static void Main(string[] args)
{
    var oppositeFiles = Directory.GetFiles("Opposite");
    foreach (var opposite in oppositeFiles)
    {
        var fileName = Path.GetFileName(opposite);
        var refName = fileName[1] == 'm' ? fileName.Remove(1, 1).Insert(1, "f") : fileName.Remove(1, 1).Insert(1, "m");
        if (!File.Exists($"Reference/{refName}"))
        {
            Console.WriteLine($"No reference file for {opposite}: Reference/{refName} doesn't exist");
            continue;
        }
        using (var op = Package.OpenPackage(0, $"{opposite}", true))
        {
            using (var rp = Package.OpenPackage(0, $"Reference/{refName}"))
            {
                var oppositeSwatches = op.GetResourceList.Where(rie => rie.ResourceType == 0x034AEECB).ToList();
                var referenceSwatches = rp.GetResourceList.Where(rie => rie.ResourceType == 0x034AEECB).ToList();
                for (var i = 0; i < oppositeSwatches.Count; i++)
                {
                    var opRes = (CASPartResource.CASPartResource)WrapperDealer.GetResource(0, op, oppositeSwatches[i], false);
                    var refRes = (CASPartResource.CASPartResource)WrapperDealer.GetResource(0, rp, referenceSwatches[i], false);
                    opRes.TGIList = refRes.TGIList;
                    op.ReplaceResource(oppositeSwatches[i], opRes);
                }
            }
            op.SavePackage();
        }
    }
    Console.WriteLine("Done");
    Console.ReadKey();
}