How to convert system.web.mvc.httprequestbase to microsoft.aspnetcore.http.httprequest (ASP.NET core 3.1)

See more:

C#3.5

ASP.NET-Core

.NET-Core

TL;DR: Properties that need to be converted from HttpRequestBase to HttpRequest at the bottom along with my best guesses

I'm developing a web application that uses ASP.Net 3.1 Core and I am trying to implement OAuth 2 authentication.

The sample code that I am following is old (uses System.Web) and I'm having issues trying to convert this to the newer standards.

The original code in the Controller class has:

[HttpPost]
public async Task<ActionResult> oauth2Request()
{
	oauthHelper oauth = new oauthHelper(Request);

Where Request is of type System.Web.Mvc.HttpRequestBase.

When I do the equivalent code in my application, I have:

[HttpPost]
public async Task<IActionResult> oauth2Request()
{
	oauthHelper oauth = new oauthHelper(Request);

and Request is now Microsoft.AspNetCore.Http.HttpRequest.

I need to get the equivelent properties out of Microsoft.AspNetCore.Http.HttpRequest:
System.Web.Mvc.HttpRequestBase.Form (NameValueCollection)
[Microsoft.AspNetCore.Http.HttpRequest.HttpContext.Request.Form with a loop to change the KeyValuePairs to the NameValueCollection ?]

System.Web.Mvc.HttpRequestBase.UserHostAddress (string)
[Microsoft.AspNetCore.Http.HttpRequest.HttpContext.Connection.RemoteIpAddress.ToString() ?]

System.Web.Mvc.HttpRequestBase.Url (Uri)

System.Web.Mvc.HttpRequestBase.HttpMethod (string)
[Microsoft.AspNetCore.Http.HttpRequest.Method ?]

What I have tried:

I've shown three of the four properties that I need with my best guess. If these are wrong, please let me know.

I have no idea at all how to do the conversion from the

HttpRequestBase.Url

property. I don't even know what it is supposed to contain.