सी# में, कैसे मैं परीक्षण/मिल/सेट रजिस्ट्री कुंजी है कि हो सकता है या मौजूद नहीं हो सकता है?

ठीक है, मैं चारों ओर शिकार हो सकता है और पाया है एक रास्ता साफ करने के लिए इसे करते हैं ।

सबसे पहले, मैं बनाया एक समारोह का परीक्षण करने के लिए बनाने के लिए और यदि आवश्यक हो तो:

        // Helper because apparently it won't do this on its own
        public RegistryKey openCreate(RegistryKey baseKey, string path)
        {
            RegistryKey test = baseKey.OpenSubKey(path);

            var reg = baseKey.OpenSubKey(path, true);
            if (reg == null)
            {
                reg = baseKey.CreateSubKey(path);
            }
            return reg;
        }

तो मैं इसे का उपयोग के रूप में इस प्रकार है:

        internal bool DownloadGroupByOff()
        {
            // Using "using" to handle auto-close when it leaves this code block (so we don't have to manually close before returning)
            using (RegistryKey localMachine = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64))
            {
                using (RegistryKey explore = localMachine.OpenSubKey(@"Software\Microsoft\Windows\Shell\Bags\AllFolders\Shell\{885A186E-A440-4ADA-812B-DB871B942259}")){
                    if (explore == null || GetValueInt(explore, "GroupView") != 0)
                        return false;
                }               
                using (RegistryKey explore = localMachine.OpenSubKey(@"Software\Microsoft\Windows\Shell\Bags\AllFolders\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}")){
                    if (explore == null || GetValueInt(explore, "GroupView") != 0)
                        return false;
                }               
                using (RegistryKey explore = localMachine.OpenSubKey(@"Software\Microsoft\Windows\Shell\Bags\AllFolders\ComDlgLegacy\{885A186E-A440-4ADA-812B-DB871B942259}")){
                    if (explore == null || GetValueInt(explore, "GroupView") != 0)
                        return false;
                }
                return true;
            }
        }
        public void DownloadGroupByEnable()
        {
            RegistryKey localMachine = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64);
            // Adding false to this command says not to throw an exception if the key doesn't exist - just ignore
            localMachine.DeleteSubKeyTree(@"Software\Microsoft\Windows\Shell\Bags\AllFolders\Shell\{885A186E-A440-4ADA-812B-DB871B942259}", false);
            localMachine.DeleteSubKeyTree(@"SOFTWARE\Microsoft\Windows\Shell\Bags\AllFolders\ComDlg\{885a186e-a440-4ada-812b-db871b942259}", false);
            localMachine.DeleteSubKeyTree(@"Software\Microsoft\Windows\Shell\Bags\AllFolders\ComDlgLegacy\{885A186E-A440-4ADA-812B-DB871B942259}", false);
            localMachine.Close();
        }

        public void DownloadGroupByDisable()
        {
            RegistryKey localMachine = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64);
            
            RegistryKey explore = openCreate(localMachine,@"SOFTWARE\Microsoft\Windows\Shell\Bags\AllFolders\ComDlg\{885a186e-a440-4ada-812b-db871b942259}");
            explore.SetValue("", "Downloads");
            explore.SetValue("GroupView", "0");
            explore.SetValue("Mode", "4");
            explore.Close();

            explore = openCreate(localMachine, @"SOFTWARE\Microsoft\Windows\Shell\Bags\AllFolders\ComDlgLegacy\{885a186e-a440-4ada-812b-db871b942259}");
            explore.SetValue("", "Downloads");
            explore.SetValue("GroupView", "0");
            explore.SetValue("Mode", "4");
            explore.Close();

            explore = openCreate(localMachine, @"SOFTWARE\Microsoft\Windows\Shell\Bags\AllFolders\Shell\{885a186e-a440-4ada-812b-db871b942259}");
            explore.SetValue("", "Downloads");
            explore.SetValue("GroupView", "0");
            explore.SetValue("Mode", "4");
            explore.Close();

            localMachine.Close();
        }

मैं सुझाव के लिए खुला के लिए किसी भी तरह से यह सुधार किया जा सकता है/साफ है.