[Closed] Sort function C#

 public static int CMP(IntPtr param0, IntPtr param1)
        {
            IINode A = GlobalInterface.Instance.INode.Marshal(param0);
            IINode B = GlobalInterface.Instance.INode.Marshal(param1);

            var a = A.GetNodeTM(Now, interval).Trans;  // not able to access Trans, max crash here
            var b = B.GetNodeTM(Now, interval).Trans;  // not able to access Trans
           return (true) ? -1 : ((true) ? 1 : 0);           
        }

            IINodeTab sceneobjs = GlobalInterface.Instance.INodeTab.Create();
            GlobalInterface.Instance.COREInterface19.GetSelNodeTab(sceneobjs);


            GlobalDelegates.Delegate19 delegate19 = new GlobalDelegates.Delegate19(CMP);
            sceneobjs.Sort(delegate19);


    ````

i'll return value based on position of selected nodes , how can i access Trans for each node in fuction
thanks.