Where to look for 1C in the registry (C#)?

Question

.NET

I'm trying to find a thin client in the registry like this:

RegistryKey ThinClient = Registry.LocalMachine.OpenSubKey("Software").OpenSubKey("1C");

            if (ThinClient != null)
            {
                RegistryKey isLoaded = ThinClient.OpenSubKey("1C:Enterprise 8 Thin client (8.3.9.2170)");

                if (isLoaded != null)
                {
                    Process ThinClientRun = new Process();
                    ThinClientRun.StartInfo.FileName = "cmd.exe";
                    ThinClientRun.StartInfo.Arguments = @"/C cd " + Application.StartupPath + "/bin & load.bat " + DB.User.Name;
                    ThinClientRun.Start();
                }
            }

But ThinClient is already null, and other programs find it calmly, but with 1C such a moment .. Tell me what needs to be fixed, maybe there is another way to check if the thin client is installed on the machine