Reference Refusing to resolve

Question

I am trying to upload a file using asp.net core 2 and mvc however I have some code which No matter what I do will not resolve to system.web as I am using the that will not resolve sorry if this is really simple I am new to asp.net comming from a webforms background.

public ActionResult FileUpload(HttpPostedFileBase file)
{
        if (file != null)
        {
            string pic = System.IO.Path.GetFileName(file.FileName);
            string path = System.IO.Path.Combine(
                                   Server.MapPath("~/images/profile"), pic);
            // file is uploaded
            file.SaveAs(path);

            // save the image path path to the database or you can send image 
            // directly to database
            // in-case if you want to store byte[] ie. for DB
            using (MemoryStream ms = new System.IO.MemoryStream())
            {
                file.InputStream.CopyTo(ms);
                byte[] array = ms.GetBuffer();
            }

        }
        // after successfully uploading redirect the user
        return RedirectToAction("actionname", "controller name");
}

Server is not resolved nore is httpPostedFileBase but are these not just standard methods in System.Web anymore

These are my existing references

You should use IFormFile in asp.net core. See this [How to upload files in asp.net core?](https://stackoverflow.com/questions/35379309/how-to-upload-files-in-asp-net-core) — Shyju, Oct 21 '17 at 15:41
You are using .NET core so `System.Web` does not exist there. For your file use `IFormFile` beeing part of the ASP.NET Core implementation. — Cristian Szpisjak, Oct 21 '17 at 17:03

Reference Refusing to resolve

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