Example of csom looping recursively through termstore

  private void addNodes(TreeNode treeNode,Term term,string source = "Root")

        {

            if (term.Terms.Count > 0)

            {

                foreach (Term t in term.Terms)

                {

                    TreeNode tn = new TreeNode(string.Format("{0}  - {1}", t.Name, t.Id.ToString()));

                    treeNode.Nodes.Add(tn);

                    status.Text = string.Format("{0}-{1}", source, t.Name);

                    Application.DoEvents();

                    context.Load(t.Terms);

                    context.ExecuteQuery();

                    if (t.Terms.Count > 0)

                    {

                        addNodes(tn, t, string.Format("{0}-{1}", source, t.Name));

                    }

                }

            }

        }

 //calling code here

   foreach (Term t in ts.Terms)

            {

                TreeNode tn = new TreeNode(string.Format("{0}  - {1}", t.Name,t.Id.ToString()));

                status.Text = t.Name;

                Application.DoEvents();

                    //tn.Nodes.Add(string.Format("{0}",t.Id.ToString()));

                if (Recursive.Checked && (item.Text.Length == 0 || t.Name.Equals(item.Text, StringComparison.OrdinalIgnoreCase )))

                {

                    context.Load(t.Terms);

                    context.ExecuteQuery();

                    if (t.Terms.Count > 0)

                    {

                        addNodes(tn, t, t.Name);

                    }

                }

               treeNode.Nodes.Add (tn);

            }

          

            TV.Nodes.Add(treeNode);