IIS Express crashing asp.net 3.1 utf8 encoding - asp.net-core

Question

I used this function all the time in asp.net mvc to fetch data from an API but in asp.net core it's crashing out. I believe it may be an issue to do with the utf8 in .net core has anyone else had issues with this I just get an iis express error of -1 and the code bombs out
public async Task<List<Stock>> GetStockFromApi()
{
List<Stock> _result = new List<Stock>();
var uri = new Uri(string.Format(Constants.GetALlStock, string.Empty));
var response = await _httpClient.GetAsync(uri);
if (response.IsSuccessStatusCode) {
var byteArray = await response.Content.ReadAsByteArrayAsync();
var content = Encoding.UTF8.GetString(byteArray, 0, byteArray.Length);
_result = JsonConvert.DeserializeObject<List<Stock>>(content);
}
return _result.ToList();
}

Answer 1

Make sure your api result (byteArray) in your case is correct.
It works well when I use your code in a brand new asp.net core 3.1 mvc project:
1.Add Microsoft.AspNetCore.Mvc.NewtonsoftJson package to project from PMC
Install-Package Microsoft.AspNetCore.Mvc.NewtonsoftJson -Version 3.1.0
2.Register it in startup.cs
services.AddControllersWithViews().AddNewtonsoftJson();
3. Test Action:
public async Task<List<Stock>> GetStockFromApi()
{
List<Stock> _result = new List<Stock>();
var uri = new Uri("https://localhost:44321/home/GetAllStock");
using (var client = new HttpClient())
{
var response = await client.GetAsync(uri);
if (response.IsSuccessStatusCode)
{
var byteArray = await response.Content.ReadAsByteArrayAsync();
var content = Encoding.UTF8.GetString(byteArray, 0, byteArray.Length);
_result = JsonConvert.DeserializeObject<List<Stock>>(content);
}
return _result.ToList();
}
}
public ActionResult<List<Stock>> GetAllStock()
{
var list = new List<Stock>()
{
new Stock()
{
Id = 1,
Name="hello"
},
new Stock()
{
Id = 2,
Name="wrold"
},
};
return Ok(list);
}