private string HandleHttpError(Exception ex, string text)
        {
            if (ex is HttpException { StatusCode: 404})
            {
                return $"[NOT FOUND]";
            }
            else if (ex is HttpException { StatusCode: 500})
            {
                return $"[INTERNAL SERVER ERROR]";
            }
            else
            {
                return text;
            }
        }

<div class="city" ng-repeat="item in items">
     {{item.title}}
<div>

$scope.items=[
     {title:'اردبیل'},
     {title:'تهران'},
     {title:'تبریز'},
     {title:'مشهد'},
     {title:'اصفهان'}
];

$('.city').draggable();

app.directive('ngFinishRender', function ($timeout) {
    return {
        restrict: 'A',
        link: function (scope, element, attr) {
            if (scope.$last === true) {
                $timeout(function () {
                    scope.$eval(attr.ngFinishRender);
                }, 0);
            }
        }
    }
});

<div class="city" ng-repeat="item in items" ng-finish-render="init()">
     {{item.title}}
<div>

$scope.items=[
     {title:'اردبیل'},
     {title:'تهران'},
     {title:'تبریز'},
     {title:'مشهد'},
     {title:'اصفهان'}
];

$scope.init=function(){
     $('.city').draggable();
}

<img src="smiley.gif" alt="Smiley face" height="42" width="42">

using System.Collections.Generic;

namespace testWinForms87
{
 class CDbgDisplay
 {
     public struct Person
     {
         public string Name;
         public int Id;
     }

     public static List<Person> GetData()
     {
         List<Person> data = new List<Person>();
         for (int i = 0; i < 40; i++)
             data.Add(new Person { Name = "P" + i, Id = i });
         return data;
     }
 }

}

[DebuggerDisplay("Name:{Name},Id={Id}")]

private static FSDirectory _directoryTemp;

private static FSDirectory _directory
{
            get
            {
                if (_directoryTemp == null)
                    _directoryTemp = FSDirectory.Open(new DirectoryInfo(_luceneDir));
                if (IndexWriter.IsLocked(_directoryTemp))
                    IndexWriter.Unlock(_directoryTemp);
                string lockFilePath = Path.Combine(_luceneDir, "write.lock");
                if (File.Exists(lockFilePath))
                    File.Delete(lockFilePath);
                return _directoryTemp;
            }
}

class PirateName {
  ...
  String get jsonString => JSON.encode({"f": _firstName, "a": _appellation});
}

final String TREASURE_KEY = 'pirateName';

void main() {
  ...
}

void setBadgeName(PirateName newName) {
  if (newName == null) {
    return;
  }
  querySelector('#badgeName').text = newName.pirateName;
  window.localStorage[TREASURE_KEY] = newName.jsonString;
}

void setBadgeName(PirateName newName) {
  ...
}

PirateName getBadgeNameFromStorage() {
  String storedName = window.localStorage[TREASURE_KEY];
  if (storedName != null) {
    return new PirateName.fromJSON(storedName);
  } else {
    return null;
  }
}

void main() {
  ...
  setBadgeName(getBadgeNameFromStorage());
}

{ "names": [ "Anne", "Bette", "Cate", "Dawn",
        "Elise", "Faye", "Ginger", "Harriot",
        "Izzy", "Jane", "Kaye", "Liz",
        "Maria", "Nell", "Olive", "Pat",
        "Queenie", "Rae", "Sal", "Tam",
        "Uma", "Violet", "Wilma", "Xana",
        "Yvonne", "Zelda",
        "Abe", "Billy", "Caleb", "Davie",
        "Eb", "Frank", "Gabe", "House",
        "Icarus", "Jack", "Kurt", "Larry",
        "Mike", "Nolan", "Oliver", "Pat",
        "Quib", "Roy", "Sal", "Tom",
        "Ube", "Val", "Walt", "Xavier",
        "Yvan", "Zeb"],
  "appellations": [ "Awesome", "Captain",
        "Even", "Fighter", "Great", "Hearty",
        "Jackal", "King", "Lord",
        "Mighty", "Noble", "Old", "Powerful",
        "Quick", "Red", "Stalwart", "Tank",
        "Ultimate", "Vicious", "Wily", "aXe", "Young",
        "Brave", "Eager",
        "Kind", "Sandy",
        "Xeric", "Yellow", "Zesty"]}

...
  <div>
    <input type="text" id="inputName" maxlength="15" disabled>
  </div>
  <div>
    <button id="generateButton" disabled>Aye! Gimme a name!</button>
  </div>
...

import 'dart:html';
import 'dart:math' show Random;
import 'dart:convert' show JSON;

import 'dart:async' show Future;

class PirateName {
  ...
  static List<String> names = [];
  static List<String> appellations = [];
  ...
}

class PirateName {
  ...

  static Future readyThePirates() {
    var path = 'piratenames.json';
    return HttpRequest.getString(path)
        .then(_parsePirateNamesFromJSON);
  }
  
  static _parsePirateNamesFromJSON(String jsonString) {
    Map pirateNames = JSON.decode(jsonString);
    names = pirateNames['names'];
    appellations = pirateNames['appellations'];
  }
}

SpanElement badgeNameElement;

void main() {
  ...
}

void main() {
  InputElement inputField = querySelector('#inputName');
  inputField.onInput.listen(updateBadge);
  genButton = querySelector('#generateButton');
  genButton.onClick.listen(generateBadge);
  
  badgeNameElement = querySelector('#badgeName');
  ...
}

void main() {
  ...
  
  PirateName.readyThePirates()
    .then((_) {
      //on success
      inputField.disabled = false; //enable
      genButton.disabled = false;  //enable
      setBadgeName(getBadgeNameFromStorage());
    })
    .catchError((arrr) {
      print('Error initializing pirate names: $arrr');
      badgeNameElement.text = 'Arrr! No names.';
    });
}

Chat c = new Chat();
            ChatLog m = new ChatLog();
        public Guid NewObjects(Guid Id)
        {
    
            return Id;
      
         }
        public Guid idChat { get ; set; }
        public void CreateChat()
        {
  
           Guid Id = Guid.Parse(Context.ConnectionId);
             NewObjects(Id);
            idchat=Id;
            c.ChatId = Id;
            c.Time = 25;
            c.UserId = "87EC3AD1 - 53D1 - 4649 - 8CF3 - 2CD5ADB1938C";
         
            var chat = db.Chats.FirstOrDefault(c => c.ChatId == Id);
            if (chat == null)
            {
                db.Chats.Add(c);
                db.SaveChanges();
            }
            db.Dispose();
     

        }

      
        public void broadcastMessage(string name, string message, Guid Id)
        {


           
            m.ChatText = message;
            m.Id = Id;
            m.ChatDate = DateTime.Now;
            m.UserId = "87EC3AD1 - 53D1 - 4649 - 8CF3 - 2CD5ADB1938C";
            db.ChatLogs.Add(m);
            db.SaveChanges();

            db.Dispose();
            Clients.All.Msg(name, message,m.Id);


        }