TIA TIA V15 Openness Namespace fehlt

AppDomain.CurrentDomain.AssemblyResolve += MyResolver;

private static Assembly MyResolver(object sender, ResolveEventArgs args)
        {
            int index = args.Name.IndexOf(',');
            if (index == -1)
            {
                return null;
            }
            string name = args.Name.Substring(0, index);

            RegistryKey filePathReg = Registry.LocalMachine.OpenSubKey(
                "SOFTWARE\\Siemens\\Automation\\Openness\\15.0\\PublicAPI\\15.0.0.0");

            if (filePathReg == null)
                return null;

            object oRegKeyValue = filePathReg.GetValue(name);
            if (oRegKeyValue != null)
            {
                string filePath = oRegKeyValue.ToString();

                string path = filePath;
                string fullPath = Path.GetFullPath(path);
                if (File.Exists(fullPath))
                {
                    return Assembly.LoadFrom(fullPath);
                }
            }

            return null;
        }