WEB API .NET 5 Stream JSON objects to the client fetch request - asp.net-core-webapi

Question

With the following source code I am able to stream JSON objects via ASP.NET Web API, that's fine & cool !
I would like to migrate this source code to .NET 5. Since PushStreamContent class is not provided any more, Can anyone help me to facing with solution ? Any reference or examples are kindly accepted.
Mersi
using Newtonsoft.Json;
using System;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
namespace WebApplication1.Controllers
{
public class ValuesController : ApiController
{
[HttpGet]
public HttpResponseMessage GetMultipartData()
{
var response = new HttpResponseMessage();
var content = new PushStreamContent(new Action<Stream, HttpContent, TransportContext>(WriteContent), "application/json");
response.Headers.TransferEncodingChunked = true;
response.Content = content;
return response;
}
public static void WriteContent(Stream stream, HttpContent content, TransportContext context)
{
var serializer = JsonSerializer.CreateDefault();
using (var sw = new StreamWriter(stream))
using (var jw = new JsonTextWriter(sw))
{
jw.WriteStartArray();
foreach (var id in Enumerable.Range(1, 100000))
{
serializer.Serialize(jw, new TestModel()
{
Alias = "rvhuang",
BirthDate = new DateTime(1985, 02, 13),
FirstName = "Robert",
LastName = "Huang",
ID = id,
MiddleName = "Vandenberg",
});
}
jw.WriteEndArray();
}
}
}
public class TestModel
{
public string FirstName
{
get; set;
}
public string MiddleName
{
get; set;
}
public DateTime BirthDate
{
get; set;
}
public string LastName
{
get; set;
}
public string Alias
{
get; set;
}
public int ID
{
get; set;
}
}
}