using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Reflection;

using System.Diagnostics;

public class Program

{

       static public void Main(string[] args)

        {

            var exceptions = new Exception[]{

                new HubException("storage error", "StorageService", HttpStatusCode.BadRequest), 

                new HubException("target error", "TargetService"), 

                new Exception("exception error")

            };

            AggregateHubException achex = new(exceptions, "Controller");

            Console.WriteLine(achex.Message);

            Console.WriteLine("");

            Console.WriteLine($"Status Code: {achex.StatusCode}");

        }

​

    }

​

public class AggregateHubException : AggregateException  {

        public HttpStatusCode StatusCode { get; set; }

​

        public string SourceName { get; set; }

​

        public override string Message { get; }

​

         public AggregateHubException(Exception[] exceptions, string sourceName) : base(exceptions) {

            sourceName = $"{Assembly.GetCallingAssembly().FullName.Split(',').First()}.{NameOfCallingClass()}";

​

            this.StatusCode = exceptions.Select(

                ex => ex is HubException chex ?

                chex.StatusCode :

                HttpStatusCode.InternalServerError

                ).Max();

​

            this.SourceName = sourceName;

​

            this.Message = String.Join(

                "\r\n",

                new string[] { $"[{sourceName}] One or more errors occurred:" }.Concat(

                exceptions.Select(ex => ex is HubException chex ?

                                        $"[{chex.SourceName}] {(int)chex.StatusCode}-{chex.StatusCode}: {chex.PureMessage}" :

                                        $"500-InternalServerError: {ex.Message}"))

                );

        }

        public static string NameOfCallingClass(){

                string fullName;

                Type declaringType;

                int skipFrames = 2;

                do

                {

                    MethodBase method = new StackFrame(skipFrames, false).GetMethod();

                    declaringType = method.DeclaringType;

                    if (declaringType == null)

                    {

                        return method.Name;

                    }

                    skipFrames++;

                    fullName = declaringType.FullName;

                }

                while (declaringType.Module.Name.Equals("mscorlib.dll", StringComparison.OrdinalIgnoreCase));

​

                return fullName;

            }

}

​

public class HubException : Exception {

        public HttpStatusCode StatusCode { get; set; }

​

        public string SourceName { get; set; }

​

        public override string Message { get; }

        public string PureMessage { get; }

​

        public HubException(string message, string sourceName, HttpStatusCode? statusCode = HttpStatusCode.InternalServerError, Exception ex = null) : base(message, ex) {

            sourceName = $"{Assembly.GetCallingAssembly().FullName.Split(',').First()}.{sourceName}";

​

            this.StatusCode = statusCode.Value;

            this.SourceName = sourceName;

            this.PureMessage = message;

            this.Message = $"[{sourceName}] {((ex != null) ? ex.Message : message)}";

        }

    }

​