基于https://neo4j.com/docs/rest-docs/3.2/#rest-api-get-service-root
var client = new RestClient();
client.BaseUrl = new Uri("http://localhost:7474/db/data");
client.Authenticator = new HttpBasicAuthenticator("a1oleg", _pass);
var request = new RestRequest("GET");
request.AddHeader("Accept", "application/json");
request.AddHeader("Accept-charset", "UTF-8");
IRestResponse response = client.Execute(request);