RegistryKey key = Registry.LocalMachine.OpenSubKey("Software\\[x26]VOLAND\\VSQ4 Launcher\\");

            if ( <CHECKING> ) // тут должна идти проверка существования ключа
            {
                RegistryKey newkey;
                key = Registry.LocalMachine.OpenSubKey("Software").CreateSubKey("[x26]VOLAND").CreateSubKey("VSQ4 Launcher");
                key.SetValue("X", "100");
                key.SetValue("Y", "100");
                key.Close();
            }
            else
            {
                string X = key.GetValue("X").ToString();
                string Y = key.GetValue("Y").ToString();
                this.Location = new Point(Int32.Parse(X), Int32.Parse(Y));
            };