View difference between Paste ID: TXwEMiE4 and t6Cmxxuq

-private void treeView1_ItemDrag(object sender, ItemDragEventArgs e)
+private void treeView1_DragEnter(object sender, DragEventArgs e)
         {
-            if (e.Button != MouseButtons.Left || (e.Item as TreeNode) == null)
+            e.Effect = DragDropEffects.Copy;
         }
 
-            try
+        private void treeView1_DragDrop(object sender, DragEventArgs e)
-            {
+
-                string[] fileList = new string[] { (e.Item as TreeNode).Text.ToString() };
+            TreeNode t = treeView1.GetNodeAt(treeView1.PointToClient(new Point(e.X, e.Y)));
-                DataObject fileDragData = new DataObject(DataFormats.FileDrop, fileList);
+            if (t == null)
-                DoDragDrop(fileDragData, DragDropEffects.Copy);
+
-            }
+            string[] FileList = (string[])e.Data.GetData(DataFormats.FileDrop, false);
-            catch (Exception ex)
+            foreach (string File in FileList)
-            {
+                t.Nodes.Add(File);
-                MessageBox.Show(ex.Message, "DragNDrop Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+