C#中动态添加RadioButton，并将他们添加到一个GroupBox中。
代码全手动添加，不借助Form Design.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
namespace RadioButtonTest
{
     static class Program
     {
         /// <summary>
         /// The main entry point for the application.
         /// </summary>
         [STAThread]
         static void Main()
         {
             Application.EnableVisualStyles();
             Application.SetCompatibleTextRenderingDefault(false);
             //Application.Run(new Form1());
             int count = 2;            // Number of Radio button
             Form form = new Form();
             GroupBox groupBox1 = new System.Windows.Forms.GroupBox();
             groupBox1.Location = new System.Drawing.Point(10, 10);
             groupBox1.Size = new System.Drawing.Size(230, 56 + 35 * (count - 1));
             groupBox1.Text = "";
             for (int i = 0; i < count; i++)
             {
                 RadioButton rb = new RadioButton();
                 rb.Text = "Test_" + i.ToString() + "_RadioButton";
                 rb.AutoSize = true;
                 rb.Location = new System.Drawing.Point(40, 25 + i * 35);
                 groupBox1.Controls.Add(rb);
             }
            
             Button cmdCancel = new Button();
             cmdCancel.Text = "Cancel";
             cmdCancel.DialogResult = DialogResult.Cancel;


             cmdCancel.Location = new System.Drawing.Point(165, groupBox1.Height + 20);
             Button cmdOK = new Button();
             cmdOK.Text = "OK";
             cmdOK.DialogResult = DialogResult.OK;
             cmdOK.Location = new System.Drawing.Point(80, groupBox1.Height + 20);
             form.Text = "DPK file choose";
             form.MaximizeBox = false;
             form.MinimizeBox = false;
             form.AutoSizeMode = AutoSizeMode.GrowAndShrink;
             form.SizeGripStyle = SizeGripStyle.Hide;
             form.ClientSize = new System.Drawing.Size(250, groupBox1.Height + 54);
             form.Controls.Add(groupBox1);
             form.Controls.Add(cmdCancel);
             form.Controls.Add(cmdOK);
             if (form.ShowDialog() == DialogResult.OK)
             {
                 foreach (RadioButton rb in groupBox1.Controls)
                 {
                     if (rb.Checked)
                     {
                         MessageBox.Show(rb.Text);
                         break;
                     }
                 }
                 MessageBox.Show("No select");
             }
             else
             {
                 MessageBox.Show("Cancel");
             }
         }
     }
}