asp.net core get root url in view

Request.Url.GetLeftPart(UriPartial.Authority) + Url.Content("~")

FOR ASP.NET CORE:
public WhateverController(IHttpContextAccessor context) //In the constructor
{
  var request = context.HttpContext.Request;
  var _baseURL = $"{request.Scheme}://{request.Host}"; // http://localhost:5000
}