/// <summary>
/// Opens the registry key at the address specified by the DeviceKey property
/// </summary>
/// <returns>A RegistryKey instance for successful call, otherwise null</returns>
/// <exception cref="WindowsDisplayAPI.Exceptions.InvalidRegistryAddressException">Registry address is invalid or unknown.</exception>
public Microsoft.Win32.RegistryKey OpenDeviceKey()
{
if (string.IsNullOrWhiteSpace(DeviceKey))
{
return(null);
}
const string machineRootName = "\\Registry\\Machine\\";
const string userRootName = "\\Registry\\Current\\";
if (DeviceKey.StartsWith(machineRootName, System.StringComparison.InvariantCultureIgnoreCase))
{
return(Microsoft.Win32.Registry.LocalMachine.OpenSubKey(
DeviceKey.Substring(machineRootName.Length),
Microsoft.Win32.RegistryKeyPermissionCheck.ReadSubTree
));
}
if (DeviceKey.StartsWith(userRootName, System.StringComparison.InvariantCultureIgnoreCase))
{
return(Microsoft.Win32.Registry.Users.OpenSubKey(
DeviceKey.Substring(userRootName.Length),
Microsoft.Win32.RegistryKeyPermissionCheck.ReadSubTree
));
}
throw new Exceptions.InvalidRegistryAddressException("Registry address is invalid or unknown.");
}
