مدیریت خطاها ( Exception handling ) در Asp.Net Core 3.1

public class ExceptionResult 
{
    public ExceptionResult(string message, int statusCode)
    {
        this.Message = message;
        this.StatusCode = statusCode;
    }
    public string Message { get; set; }
    public int StatusCode { get; set; }
}

public class AdvancedExceptionHandler
{
    private readonly RequestDelegate _next;
    private readonly ILogger<AdvancedExceptionHandler> _logger;
    private readonly IWebHostEnvironment _env;

    public AdvancedExceptionHandler(RequestDelegate next, ILogger<AdvancedExceptionHandler> logger, IWebHostEnvironment env)
    {
        _next = next;
        _logger = logger;
        _env = env;
    }
    public async Task Invoke(HttpContext context)
    {
        string message = null;
        HttpStatusCode httpStatusCode = HttpStatusCode.InternalServerError;
        try
        {
            await _next(context);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex.Message, ex);

            if (_env.IsDevelopment())
            {
                var dic = new Dictionary<string, string>
                {
                    ["StackTrace"] = ex.StackTrace,
                    ["Exception"] = ex.Message
                };
                message = JsonConvert.SerializeObject(dic);
            }
            else
            {
                message = "an error has occurred";
            }
            await WriteToReponseAsync();
        }
        async Task WriteToReponseAsync()
        {
            if (context.Response.HasStarted)
                throw new InvalidOperationException("The response has already started");
            var exceptionResult = new ExceptionResult(message, (int)httpStatusCode);
            var result = JsonConvert.SerializeObject(exceptionResult);
            context.Response.StatusCode = (int)httpStatusCode;
            context.Response.ContentType = "application/json";
            await context.Response.WriteAsync(result);
        }
    }
}

 await _next(context);

public static class ExceptionHandlerMiddlewareExtension
{
    public static void UseAdvancedExceptionHandler(this IApplicationBuilder app)
    {
        app.UseMiddleware<AdvancedExceptionHandler>();
    }
}

public void Configure(IApplicationBuilder app)
{
    app.UseAdvancedExceptionHandler();//<--NOTE THIS
    app.UseCookiePolicy();
    app.UseHttpsRedirection();
    app.UseRouting();
    app.UseAuthentication();
    app.UseAuthorization();
    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllerRoute(
             name: "default",
             pattern: "{controller=Home}/{action=Index}/{id?}");
    });
}