Read registry with WMI and use microsoft.management.infrastructure with cimsession.

string strComputer = "ComputerName";
           string strUser = "UserName";
           string strPassword = "UserPassword";
           string strDomain = "DomainName";


           SecureString securepassword = new SecureString();
           foreach (char c in strPassword)
           {
               securepassword.AppendChar(c);
           }

           CimCredential Credentials = new CimCredential(PasswordAuthenticationMechanism.Kerberos, strDomain, strUser, securepassword);
           WSManSessionOptions SessionOptions = new WSManSessionOptions() { DestinationPort = 5985 };
           SessionOptions.AddDestinationCredentials(Credentials);
           CimSession SystemSession = CimSession.Create(strComputer, SessionOptions);
           bool Connected = SystemSession.TestConnection(out CimInstance TmpInstance, out CimException TmpExeption);



           // CLASSES_ROOT = 2147483648;
           // CURRENT_USER = 2147483649;
           // LOCAL_MACHINE = 2147483650;
           // USERS = 2147483651;
           // CURRENT_CONFIG = 2147483653;

           UInt32 RegRoot = 2147483650;

           CimMethodParametersCollection CimParams = new CimMethodParametersCollection();
           CimParams.Add(CimMethodParameter.Create("hDefKey", RegRoot, CimFlags.In));
           CimParams.Add(CimMethodParameter.Create("sSubKeyName", @"SOFTWARE\Microsoft\Windows NT\CurrentVersion", CimFlags.In));
           CimParams.Add(CimMethodParameter.Create("sValueName", "UBR", CimFlags.In));


           // GetStringValue = sValue
           // GetMultiStringValue = sValue
           // GetExpandedStringValue = sValue

           // GetDWORDValue = uValue
           // GetQWORDValue = uValue
           // GetBinaryValue = uValue

           CimMethodResult NameResults = SystemSession.InvokeMethod(new CimInstance("StdRegProv", @"root\default"), "GetDWORDValue", CimParams);

           string strUBR_RegistryValue = NameResults.OutParameters["uValue"].Value.ToString();