fix(.NET): always include listed errors in Collection of Errs msg

Author: texastony

AwsEncryptionSDK/runtimes/net/Generated/AwsEncryptionSdk/CollectionOfErrors.cs

@@ -1,16 +1,27 @@
 // Copyright Amazon.com Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 // Do not modify this file. This file is machine generated, and any changes to it will be overwritten.
+
 using System;
-using AWS.Cryptography.EncryptionSDK;
+using System.Collections.Generic;
+
 namespace AWS.Cryptography.EncryptionSDK
 {
     public class CollectionOfErrors : Exception
     {
         public readonly System.Collections.Generic.List<Exception> list;
-        public CollectionOfErrors(System.Collections.Generic.List<Exception> list, string message) : base(message) { this.list = list; }
+        public CollectionOfErrors(System.Collections.Generic.List<Exception> list, string message) : base(message + $"\n List: \n{ListAsString(list)}") { this.list = list; }
         public CollectionOfErrors(string message) : base(message) { this.list = new System.Collections.Generic.List<Exception>(); }
         public CollectionOfErrors() : base("CollectionOfErrors") { this.list = new System.Collections.Generic.List<Exception>(); }
+
+        private static string ListAsString(List<Exception> list)
+        {
+            if (list.Count < 1) return "";
+            string [] msgArr = new string [list.Count];
+            for (int i = 0; i < list.Count; i++)
+                msgArr[i] = $"{list[i].GetType().Name} :: {list[i].Message}";
+            return String.Join("\n\t", msgArr);
+        }
     }
 
 }