C#

private void ShowQuestionsAndAnswers(ArrayList questions, ArrayList answers)
        {
           
           
           
            groupBox2.Enabled = true;
            j = 0;

            for (int i = 0; i < questions.Count; i++)
            {
                tbp.Invalidate();
                j = i;
                ArrayList ans = new ArrayList();
                
                GroupBox gb = new GroupBox();
                //gb.AutoSize = true;
                gb.Size = new Size(tbp.Width - 100, 150);
                tbp.Controls.Add(gb); // Adding the groupbox to the main table panel added during design time.
                TableLayoutPanel tbp2 = new TableLayoutPanel();// a panel for the controls inside the group box
                tbp2.ColumnCount = 1; // ensure that there is only one column in the panel inside the group box
                tbp2.AutoSize = true;
                gb.Controls.Add(tbp2);// add the panel in the group box
                // Make the controls (a label and four radiobuttons)i want to use ready
                Label newLabel = new Label();
                //gb.Text = examsQuestions[i].ToString();
                newLabel.Text = (i + 1).ToString() + ". " + questions[i].ToString();
                newLabel.AutoSize = true;
                newLabel.BringToFront();
                newLabel.Size = new Size(1000, 100);
                RadioButton rdb1 = new RadioButton();
                rdb1.AutoSize = true;
                tbp2.SetRow(rdb1, 1);
                rdb1.Text = a[0].ToString();
                rdb1.Click += new EventHandler(rdb_Click);
                


                RadioButton rdb2 = new RadioButton();
                rdb2.AutoSize = true;
                tbp2.SetRow(rdb2, 2);
                rdb2.Text = a[1].ToString(); ;
                rdb2.Click += new EventHandler(rdb_Click);

                RadioButton rdb3 = new RadioButton();
                rdb3.AutoSize = true;
                rdb3.Text = a[2].ToString(); ;
                rdb3.Click += new EventHandler(rdb_Click);

                RadioButton rdb4 = new RadioButton();
                rdb4.AutoSize = true;
                rdb4.Text = a[3].ToString();
                rdb4.Click += new EventHandler(rdb_Click);

                Control[] ctrl = { newLabel,rdb1,rdb2,rdb3,rdb4 };

                tbp2.Controls.AddRange(ctrl);
                a.RemoveRange(0, 5);

            }
           
            Button btnDone = new Button();
            btnDone.Text = "Done";
            btnDone.Click += new EventHandler(btnDone_Click);
            tbp.Controls.Add(btnDone);

            StartTimer();
            

        }

//...code to open save file dialog...

//this loop to wait for all the threads finish their query
//QueryThread.threadCount is the count of the background threads
while (QueryThread.threadCount != 0)
{
    Thread.CurrentThread.Join(1000);
    Console.WriteLine(QueryThread.threadCount);
}

//...code to export data...

private void Filter_combo_SelectedIndexChanged(object sender, EventArgs e)
       {
           /* Populate the tree based on whatever the user selects to filter by
            * for example if they click on keywords then only show the keywords
            */

           string filter = Filter_combo.Text;





           using (var db = new mombooksDataContext(Properties.Settings.Default.BooksConnectionString2))
           {
               NodeBuilder.BuildNodes(treeView1.Nodes,db.Authors, db.Books, filter);
               treeView1.Nodes.Clear();//get rid of t his after we're done.

           }
       }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using momdb;

namespace Utilties
{
    public sealed class NodeBuilder
    {
        public static void BuildNodes(TreeNodeCollection nodes,IEnumerable<Author>authors, IEnumerable<Book> books, string filter)
        {
            
            if (filter == "Keywords" || filter == "Title")
            {
                books.ToList().ForEach(m =>
                    {
                        TreeNode node = new TreeNode(filter);
                        node.Tag = m;
                        nodes.Add(node);
                    });
            }
           if (filter =="Author")
           {
               authors.ToList().ForEach(m =>
                {
                TreeNode node =new TreeNode(filter); 
                node.Tag=m;
                nodes.Add(node);
                 }); 
           }
        }
    }