XLibrary.XNodeIn.GetParentChain C# (CSharp) Method

        internal XNodeIn[] GetParentChain()
        {
            if (ParentChain != null)
                return ParentChain;

            var chain = new List<XNodeIn>();

            var next = this;
            chain.Add(next);

            while (next.Parent != null)
            {
                next = next.Parent as XNodeIn;
                chain.Add(next);
            }

            ParentChain = chain.ToArray();
            return ParentChain;
        }

        private static void CreateLayerCall(XNodeIn source, XNodeIn dest)
        {
            var sourceChain = source.GetParentChain();
            var destChain = dest.GetParentChain();

            for (int i = 0; i < sourceChain.Length; i++)
                for (int x = 0; x < destChain.Length; x++)
                    if (sourceChain[i] == destChain[x])
                    {
                        if (i == 0 || x == 0)
                        {
                            LogError(string.Format("Error trying to find common link between {0} and {1}, common had 0 index", sourceChain[i].Name, destChain[x].Name));
                            return;
                        }

                        var sourceLayer = sourceChain[i - 1];
                        var destLayer = destChain[x - 1];

                        if (sourceLayer.LayerOut == null)
                            sourceLayer.LayerOut = new HashSet<int>();

                        if (destLayer.LayerIn == null)
                            destLayer.LayerIn = new HashSet<int>();

                        sourceLayer.LayerOut.Add(destLayer.ID);
                        destLayer.LayerIn.Add(sourceLayer.ID);

                        return;
                    }
        }