代码如下：

        //C#获取已安装 .NET Framework 版本

        private static string[] GetDotNetVersions()

        {

            DirectoryInfo[] directories = new DirectoryInfo(

                Environment.SystemDirectory + @"\..\Microsoft.NET\Framework").GetDirectories("v?.?.*");

            ArrayList list = new ArrayList();

            foreach (DirectoryInfo info2 in directories)

            {

                list.Add(info2.Name.Substring(1));

            }

            return (list.ToArray(typeof(string)) as string[]);

        }

        /// <summary>

        /// 确认电脑上是否安装有某个程序

        /// </summary>

        /// <param name="softWareName">程序安装后的名称</param>

        /// <returns>true: 有安裝, false:沒有安裝</returns>

        private static bool CheckSoftWartInstallState(string softWareName = "Adobe Reader")

        {

            Microsoft.Win32.RegistryKey uninstallNode =

                Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall", Microsoft.Win32.RegistryKeyPermissionCheck.ReadWriteSubTree, System.Security.AccessControl.RegistryRights.ReadKey);

            foreach (string subKeyName in uninstallNode.GetSubKeyNames())

            {

                Microsoft.Win32.RegistryKey subKey = uninstallNode.OpenSubKey(subKeyName);

                object displayName = subKey.GetValue("DisplayName");

                if (displayName != null)

                {

                    if (displayName.ToString().Contains(softWareName))

                    {

                        return true;

                        // MessageBox.Show(displayName.ToString());

                    }

                }

            }

            return false;

        }

        /// <summary>

        /// 程序运行前检测

        /// </summary>

        public static void ApplicationBeforeRunCheck()

        {

            string[] deviceName = { "PL-2303 USB-to-Serial",

                                      "Microsoft ReportViewer 2010 Redistributable",

                                      "二代证读写机具USB驱动"};

            string baseDirectory = AppDomain.CurrentDomain.BaseDirectory;

            string[] netList = GetDotNetVersions();

            bool dotNetIsOk = false;

            for (int i = 0; i < netList.Length; i++)

            {

                if (netList[i][0] == 4)

                    dotNetIsOk = true;

            }

            if (!dotNetIsOk)

            {

                Process.Start(Path.Combine(baseDirectory, "4.exe"));

                while (true)

                {

                    for (int i = 0; i < netList.Length; i++)

                        if (netList[i][0] == 4) break;

                    Thread.Sleep(1000);

                }

            }

            for (int i = 0; i < deviceName.Length; i++)

            {

                if (!CheckSoftWartInstallState(deviceName[i]))

                {

                    Process.Start(Path.Combine(baseDirectory, ((i + 1) + ".exe")));

                    while (true)

                    {

                        if (CheckSoftWartInstallState(deviceName[i]))

                            break;

                        Thread.Sleep(1000);

                    }

                }

            }

            //软件安装完成

            RegistryKey rk = Registry.LocalMachine;

            RegistryKey rk2 = rk.CreateSubKey(@"Software\Microsoft\Windows\CurrentVersion\Run");

            rk2.SetValue("jkytj", baseDirectory);

            rk2.Close();

            rk.Close();

            //软件自启完成

        }