How to remove a program in C #

Question

How to remove a software program in C #.

Microsoft.Win32.RegistryKey Fregistry = Microsoft.Win32.Registry.LocalMachine.OpenSubKey ("SOFTWARE")

            .OpenSubKey("Microsoft").OpenSubKey("Windows").OpenSubKey("CurrentVersion")
            .OpenSubKey("Installer").OpenSubKey("UserData")
            .OpenSubKey("S-1-5-18").OpenSubKey("Products");
            string[] Names = Fregistry.GetSubKeyNames();
            string uninstall = "";
            string ApplicationName = "Studio V5";
            for (int i = 0; i < Names.Length; i++)
            {
                Microsoft.Win32.RegistryKey FTemp = Fregistry.OpenSubKey(Names[i]).OpenSubKey("InstallProperties");
                **if (FTemp.GetValue("DisplayName").ToString() == ApplicationName)**
                {
                    object obj = FTemp.GetValue("UninstallString");
                    if (obj == null)
                        uninstall = "";
                    else
                        uninstall = obj.ToString();
                    i = Names.Length;
                }
            }

            System.Console.WriteLine(uninstall);
            System.Diagnostics.Process FProcess = new System.Diagnostics.Process();
            string temp = "/x{" + uninstall.Split("/".ToCharArray())[1].Split("I{".ToCharArray())[2];
            //replacing with /x with /i would cause another popup of the application uninstall
            FProcess.StartInfo.FileName = uninstall.Split("/".ToCharArray())[0];
            FProcess.StartInfo.Arguments = temp;
            FProcess.StartInfo.UseShellExecute = false;
            FProcess.Start();
            System.Console.Read();

I have an error, for example .... NULL REFERENCE EXCEPTION in string **.

Answer 1

This is a very nasty way to do this, and I doubt it will work anyway. Instead, you should use the Windows Installer API and, in particular, MsiConfigureProductand / or MsiConfigureFeaturethe c functions INSTALLSTATE_ABSENTto remove something programmatically.