Problems using WebResponse and WebRequest in asp.net core

Hello everyone, I can notoperatein asp.netmvc core the followingcode executedwithout problems in a desktop application:

var request = WebRequest.Create(requestUri);
var response = request.GetResponse();
var xdoc = XDocument.Load(response.GetResponseStream());

In ASP.NET MVC Core (using c #) does not recognize "GetResponse". How can I recoverproperly"xdoc"?