Singleton

singleton

Great Reads

State Machine - State Pattern vs. Classic Approach

by Chris875

State pattern and procedural solution illustrated

A Robust and Elegant Single Instance WPF Application Approach Using WCF

by Jon Campbell

How to utilize WCF to allow a single instance of any WPF application without needing mutexes, extra assemblies, or special "hacks".

SystemFramework library

by Scanix

SystemFramework defines interfaces, classes, and types to support a native runtime system with its own garbage collector, delegates, etc. The design of SystemFramework classes is similar to those of the .NET Framework.

Dependency Injected Singletons… What?

by Dev Leader

About dependency injected singletons

Latest Articles

Exploring the Microsoft.Extensions.DependencyInjection Machinery

by Philippe Monteil

Core concepts and mechanisms of Microsoft.Extensions.DependencyInjection Dependency Injection

Robust C++: Singletons

by Greg Utas

Yet another article on this topic?!

A Singleton Application with Interprocess Communication in C#

by honey the codewitch

Creating an application that can run once, but then accept command line args from subsequent runs

Easily Create a Singleton Application in C#

by honey the codewitch

This tip demonstrates how to create an app that only allows one instance to run at a time

All Articles

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Singleton

State Machine - State Pattern vs. Classic Approach

5 Aug 2014 by Chris875

State pattern and procedural solution illustrated

XML

.NET3.5

.NET3.0

A Robust and Elegant Single Instance WPF Application Approach Using WCF

18 May 2017 by Jon Campbell

How to utilize WCF to allow a single instance of any WPF application without needing mutexes, extra assemblies, or special "hacks".

SystemFramework library

24 Nov 2011 by Scanix

Dependency Injected Singletons… What?

2 Aug 2013 by Dev Leader

About dependency injected singletons

The Singleton Induced Epiphany

21 Jul 2014 by Paul M Watt

I am not aware of a software design pattern that has been vilified more than The Singleton. Just as every other design pattern, the singleton has its merits. Given the right situation, it provides a simple a clean solution, and just as every other design pattern, it can be misused.

singleton

Static classes vs singleton

16 Feb 2017 by F-ES Sitecore

Using singletons it is easier to control when the class is initialised to use things like lazy-initialisation etc. Using static classes you're pretty much get what you're given, your class is initialised on creation. Also using sigleton your ultimate class is still an object rather than a...

singleton

static

Singleton Pattern in action?

22 Mar 2013 by OriginalGriff

Google is your friend: Be nice and visit him often. He can answer questions a lot more quickly than posting them here...A very quick search using part of your question as the search term gave : 1.6 million hits.when to use singleton pattern[^]In future, please try to do at least...

Design

singleton

patterns

Singleton C++ class declaration

20 Jun 2013 by H.Brydon

Several thoughts:(1) your getinstance() API is not thread safe. If you have 2 or more threads calling it at the same time, you will get 2 or more objects created.(2) Is there just 1 copy of the .obj file linked somewhere? If the .cpp -> .obj file is linked into 2 or more places you...

C++

singleton

Singletons: Why Are They “Bad”?

9 Aug 2013 by Dev Leader

In this post, I’m going to focus on why singletons are “bad”, because for me it means acknowledging one of the two main perspectives–that they are the best thing since cat videos met The Internet or they are the worst thing since Justin Bieber.

Static classes vs singleton

16 Feb 2017 by Maciej Los

Check past answers to the questions:Singleton Class Vs Sealed Class Vs Static Class[^]How can I decide that I should use Static class or singleton class ??[^]Difference between static class and singleton pattern? - Stack Overflow[^]

singleton

static

What is singleton and why we have to use

25 Apr 2018 by OriginalGriff

The idea of a singleton is very simple: it's a class with a private constructor, so it cannot be instantiated form outside the class. This means that the class is absolutely in control of how many instances of the class are created, and when they are created. A singleton class creates a single...

What is singleton and why we have to use

25 Apr 2018 by CPallini

I would start form its very Wikipedia page: Singleton pattern - Wikipedia[^].

Singleton pattern without lazy loading

24 Feb 2012 by Sander Rossel

Actually I don't think this should be a problem. If you are using a singleton pattern you are probably calling a shared method that initializes your object. Even though the object is created on a certain thread this should not prevent it from being accessed from others (unless it's some UI...

C#4.0

singleton

patterns

Singleton C++ class declaration

20 Jun 2013 by JackDingler

Moved my comment here. If it fixes your issue you can mark it as the solution...When does your first call to the class occur?Perhaps it is being called before dependent libraries are loaded?Be sure that your app has fully loaded before you begin logging using any calls that aren't...

C++

singleton

How Do You Structure Your Singletons?

1 Aug 2013 by Dev Leader

How to structure your Singletons.

Singleton Class Property

24 Apr 2014 by Henrik Jonsson

As the error message tells you textbox1 is not accessible from where you want to access it. It is neither a field or property of the containing class WordCloudHelper, nor a parameter to the method GetWordCloud. I think you have to pass in check as String parameter (assigned from...

C#3.5

WPF

singleton

LNK2019 error while using static variable

2 Dec 2014 by Kornfeld Eliyahu Peter

Changeprivate: Single();toprivate: Single() {};

C++

singleton

Detail explanation of singleton drawbacks

4 May 2017 by CPallini

We have even an article on this very subject: Singleton Pattern – Positive and Negative Aspects[^]. It doesn't show examples, though. You may also try to use Google for the purpose of finding code samples.

singleton

common Singleton Pattern implementation using Generic

5 Oct 2011 by Paulo Zemek

All classes are naturally Lazy loaded.So a better implementation will be:public class Singletonwhere T: new(){ public static readonly T Instance = new T();}You will notice that before calling the singleton class, the object will not be loaded.Surely there are...

Singleton pattern without lazy loading

24 Feb 2012 by koleraba

HiI encountered a situation where I need a type of follow the singleton pattern, but the type must not be lazy loaded. This is needed becouse I want my instance to be created on the main thread - if lazy loading is used the instance will be created on the thread that first access the...

C#4.0

singleton

patterns

Singleton pattern without lazy loading

24 Feb 2012 by Shameel

Write a static method that initializes the instance and call it from the main thread before the class is first accessed.

C#4.0

singleton

patterns

Adding LogService to my Application

9 May 2012 by elad2109

I have an application (Legacy code)that contains interface `Icomponent` with `save()` methodsand many classes that implement it.I want to add log after every save().I thought to use the decorator pattern to `Icomponent` with additional `log()` method.create...

Adding LogService to my Application

9 May 2012 by Sergey Alexandrovich Kryukov

First of all, look at Apache log4net: http://logging.apache.org/log4net/[^].I think decoration components with logging is too heavy weight and too much if stiff coupling. I would allow it for an optional feature where logging is often of always useful. In general case, this is no...

Adding LogService to my Application

9 May 2012 by Sandeep Mewara

Try: Microsoft's Enterprise Library - Logging Application Block[^]Get Logging with the Enterprise Library[^]

Constructor and Destructor of a singleton object called twice

7 Nov 2012 by bikram990

I'm facing a problem in singleton object in c++. Here is the explanation:Problem info: I have a 4 shared libraries (say libA.so, libB.so, libC.so, libD.so) and 2 executable binary files each using one another shared library( say libE.so) which deals with files.The purpose of libE.so is...

C++

Linux

singleton

Constructor and Destructor of a singleton object called twice

8 Nov 2012 by Legor

It may be that your linker is configured the wrong way. Try adding -rdynamic to the linker command line.Refer to this answer which explains this behaviour:http://stackoverflow.com/questions/8623657/multiple-instances-of-singleton-across-shared-libraries-on-linux[^]

C++

Linux

singleton

How to design/write GlobalConfig class?

31 Jan 2013 by GigaKatowice

Hi.I need to create a GlobalConfig class. But I want to derive from it in another class.Here's an example:public class BaseConfig { public string GlobalPath {get; set;}}public class ConfigA : BaseConfig { public string pathA {get; set;}}public class ConfigB : ...

singleton

static

How to design/write GlobalConfig class?

30 Jan 2013 by E.F. Nijboer

Change the private constructor to protected.Good luck!

singleton

static

Singleton C++ class declaration

24 Jun 2013 by zlogdan

Hi,I have been stuck at this for more than a week, as always, I suppose this is due to some of my misconceptions and the fact I am upgrading an application from VS 2003 to VS 2010.I am now upgrading a windows service developed in the past. In the previous version, running under Windows...

C++

singleton

How to pass data from 1 client to another trugh server?

20 Oct 2013 by Kornfeld Eliyahu Peter

You may look into this...http://signalr.net/[^]

singleton

server

How to pass data from 1 client to another trugh server?

20 Oct 2013 by tdcmystere

Hello, thanks for response. Actually i don't use ASP.net, my client app is Winform

singleton

server

How to consume Singleton class

20 Nov 2013 by Sergey Alexandrovich Kryukov

This singleton definition makes no sense. In particular, display makes no sense, incorrect (would work, but it needs to be static, because "this" is not used) and unrelated to singleton functionality. Exposing Instance would work but means bad style.First, read this:...

WCF

ASP.NET

singleton

singleton parameterised constructor example

20 Nov 2013 by kingsa

Hi all, I want to how create parameterised constructor in singleton class

WCF

ASP.NET

singleton

singleton parameterised constructor example

20 Nov 2013 by SnehasishN

Hope it will help youCreate Singleton with Parameters in Constructor[^]

WCF

ASP.NET

singleton

singleton parameterised constructor example

20 Nov 2013 by Gitanjali Singh

http://stackoverflow.com/quest...

WCF

ASP.NET

singleton

Error using singleton with linq to sql execting stored procedure

26 Nov 2013 by dbrenth

Your constructors need... : base({arguments the base class constructor wants})after the declaration line. Without this, C# tries to initialize the base class using a constructor with no arguments and you can see from the error that there is no such constructor in the base class.Good...

SQL-Server

ASP.NET

singleton

Error using singleton with linq to sql execting stored procedure

26 Nov 2013 by Karthik_Mahalingam

try this code...public Singleton(String connectionString): base(connectionString) { // whatever }Make the constructor access modifiers as public and initiate base class with the connectionstring in the base class constructor..

SQL-Server

ASP.NET

singleton

Singleton Class Property

22 Apr 2014 by Alif Marz

Hi,I have this code down. string check = textbox1.Text; if (duplicate.Contains(check) == true) { int remove = Math.Max(0, final.Count - 25); final.RemoveRange(0, remove); ...

C#3.5

WPF

singleton

Serial Port Data access in all windows forms

6 May 2014 by RAHUL(10217975)

Hello Guys,I am working in windows application. We use barcode reader to login the customers. Current architect of application is in each form SerialPoet Class object is created and from DataRecieve Event data is received. Previous Developer was not able to make a singleton class SerialPort...

Serial Port Data access in all windows forms

6 May 2014 by OriginalGriff

We can't answer that directly: you have the code and we don't!But...start by looking at the actual exception object: specifically, look at the Inner Exception - this normally contains details of the actual exception, which should help you narrow down the cause.Sorry - but at the moment,...

Serial Port Data access in all windows forms

6 May 2014 by DJPJVS

Your static class will look someting like this public class SerialPortClass { private static SerialPortClass instance; public static SerialPortClass GetInstance() { return instance ?? new SerialPortClass(); } SerialPort...

Serial Port Data access in all windows forms

14 May 2014 by leon de boer

The obvious issue with having multiple forms accessing a any sort of serial class or even device is working out how to deal with who is handling the data.I mean the serial object whatever it looks like holds data does the first form to ask for it get it or are the forms expected to callback...

Singleton execution for multiple application requests

19 Jun 2014 by V5709

I have one class (Concurrency) object in which i am initiating all db related settings .All this code is in WCF service. For instance management, i have made service instance on persession basis. Now i want to share Concurrency class object through all db layer classes. I was thinking to do...

singleton

domain

application

Singleton execution for multiple application requests

5 Jul 2014 by George Jonsson

The singleton pattern is designed to return the same single instance of your class to all callers.To handle multiple requests at the same time you can use the lock mechanism.This MSDN page should give you some good...

singleton

domain

application

Singleton execution for multiple application requests

5 Jul 2014 by Raul Iloc

1.If you are just want to access and store DB related settings you do not need singleton, you could use static properties that are initialized by static constructor. 2.If you want to implement more complex concurrency scenarios in the context of WCF you could find details in the next...

singleton

domain

application

how java singleton can extends other classes?

28 Jul 2014 by Coder93

I am new to java singleton, I want to make my class singleton, so that I have one instance of it in my code. The class which I want to be singleton is extend another class which its constructor have two entries, and entries are also singleton! Below code is, what I have done! but it is not...

Java

singleton

how java singleton can extends other classes?

28 Jul 2014 by Anton Koekemoer

Assuming that the Ui and Store classes are also implemented as Singleton, you could do it as follows.public class Singleton extends Parent{ private Ui ui; private Store store; // Static field to hold the singleton instance private static final singleton INSTANCE; //...

Java

singleton

Singleton execution for multiple application requests

30 Jul 2014 by V5709

I had requirement to choose connection string at run time according to client request. so i declared an sealed class which i used to set all my db & other settings. Then i stored that particular object in cache using dictionary object & client id as key value pair. During execution i checked...

singleton

domain

application

Singleton Pattern in Web Application C# ASP.NET

26 Sep 2014 by Sergey Alexandrovich Kryukov

Please see my comment to the question.The only reasonable answer I can give is: singleton pattern may or may not be used. This pattern should not be used often. In most cases of the application, it should not be used at all. So, what's the role of it in a Web application? No role at all, if...

C#5.0

ASP.NET

singleton

How to keep a singleton in plugin dll?

25 Feb 2015 by Kr4ft3r

Hello.I am using MVC#2010 Express to create plugins for certain software. I have lots of coding experience elsewhere but remained a bit of a noob in field of Microsoft Visual Studio projects.Plugins are .dlls written in C# .NET 4.0., containing public class which implements interface...

Nested Grid in angular JS in single page application with asp.net C#

9 Apr 2015 by JatinKhimani

I am using below control for Grid developement.http://ui-grid.info/docs/#/tutorial/101_intro[^]http://ui-grid.info/[^]I phase trouble to add another grid in this grid.i need to implement nested grid.this control have feature for grouping data but i need feature like below...

singleton class throwing name doesn't existing, error

20 Oct 2015 by Manidas Payyoli

Hi iam trying an xmpp connection using singleton class,but a methode and a variable(isxmppsuccess) showing errors.My textboxes also throwing error!how i can maintain the connection in next page also?i am new to the singletonbelow mentioned is my full code and second one is error...

C#3.5

XMPP

singleton

singleton class throwing name doesn't existing, error

20 Oct 2015 by Nathan Minier

So a couple of things. Your singleton isn't thread safe, and could race with the way it's implemented now. There is an excellent article about it at:http://csharpindepth.com/Articles/General/Singleton.aspxThe easiest fix is to change the instance property to:private static...

C#3.5

XMPP

singleton

How to expose a C# singleton class via COM

27 Jul 2016 by Matt T Heffron

I have to provide functionality to be used by both new C# applications and a legacy C++ (VC6!!) application. So I'm planning on exposing the interfaces via in-process COM. One of the issues is that the new functionality requires carrying some state across uses of these COM interfaces although...

How to expose a C# singleton class via COM

14 Jul 2016 by KarstenK

I know that some global named pipes are available, which enable you to transfer data. At one side you must properly manage your server while at the other side your clients are in charge.It is a combination of named pipes and Inter-Process Communication. Use the "global" prefix.I also can...

How to expose a C# singleton class via COM

27 Jul 2016 by Matt T Heffron

I finally ended up with pretty much my second "option" above:I was able to restructure the code so the singleton class wasn't necessary.Instead, the functionality requiring the persistence was able to be moved into the classes doing the actual work and exposed there as static...

How to have single instance of webform

8 Nov 2016 by Giridharan_BE

I want to create a web application using SignalR. Upon creation, I want to validate the pages with the custom authentication using UserName and Password. When the user opens the page which is created using SignalR to fetch realtime data, an instance of the page will be created.When the user...

SignalR

singleton

How to have single instance of webform

8 Nov 2016 by vaibhav43

public sealed class Singleton{ private static Singleton instance = null; private static readonly object padlock = new object(); Singleton() { } public static Singleton Instance { get { lock (padlock) { ...

SignalR

singleton

How do i...create a singleton C# form

7 Jan 2017 by Wendelius

You could use a singleton pattern to ensure that only one instance exists, but I think that it would be easier just to loop through Application.OpenForms Property (System.Windows.Forms)[^]. Loop through the collection, check if the form exists and if it does, activate it, if it doesn't,...

form

singleton

How do i...create a singleton C# form

7 Jan 2017 by Maciej Los

I'd suggest to read past answers[^].

form

singleton

Static classes vs singleton

16 Feb 2017 by Dinesh Kumar Dora

When we can do the same thing using static classes, why do we need singleton?I researched a lot but couldn't understand the basic difference. Can somebody explain me in simple words with examples.ThanksDineshWhat I have tried:google searched but couldnt understand from the...

singleton

static

How do I create singleton design pattern thread safe in standard C++? When double checking mechanism is not fully secured?

14 Sep 2017 by Member 13409686

is it completely thread safe in C++ 98 if not, how we can achieve thread safe singleton in C++98 ? MySingleton * GetInstance() { if (m_pOnlyOneInstance == NULL) { EnterCriticalSection(); if (m_pOnlyOneInstance == NULL) // Solution 1 and 2 gaps...

C++98

singleton

Object loading only once in a singleton eager loaded console app C#

31 May 2021 by vaibhav1800

This is an Example of a Singleton class with Eager Loading Pattern and a multithreaded environment is created by using Parallel.Invoke func. (Console App) The Question is : Why only object is being created here ? Kind of confused. Try this code...

singleton

Object loading only once in a singleton eager loaded console app C#

31 May 2021 by OriginalGriff

Quote: The Question is : Why only object is being created here ? Because that is what the Singleton pattern is all about: a single instance is created and no others can be. Singleton pattern - Wikipedia[^]

singleton

Which design pattern is used for session design pattern?

28 Jun 2021 by Greg Utas

It's difficult to answer given the brevity of your question. I wouldn't call a session a design pattern. It could be called a protocol pattern, but it's not a software pattern in the usual sense of the term. As a protocol pattern, it consists of...

Exploring the Microsoft.Extensions.DependencyInjection Machinery

9 Aug 2022 by Philippe Monteil

Core concepts and mechanisms of Microsoft.Extensions.DependencyInjection Dependency Injection

.NET

dependency-injection

singleton

Singleton Design Pattern in Automation Testing

24 Sep 2015 by Anton Angelov

Explains in detail how to implement Singleton Design Pattern. Practical examples how to use it in automation tests, following all SOLID principles.

.NET

singleton

Learn C# Design patterns step by step with a project – Part 1

14 Jul 2015 by Shivprasad koirala

In this article we will learn C# Design pattern and Architecture pattern Step by Step with a project.

Thinking in Singleton instead of A Useful Generic Singleton Template

13 Dec 2013 by comiscience

This is a singleton template class which can be used by classes with a private constructor.

singleton

A Reusable Base Class for the Singleton Pattern in C#

5 Apr 2013 by Boris Brock

This article presents a reusable base class for implementing singletons in C#.

.NET

singleton

patterns

How do I create singleton design pattern thread safe in standard C++? When double checking mechanism is not fully secured?

14 Sep 2017 by Andrew Kirillov

Hello, Check the "C++ and the Perils of Double-Checked Locking"[^] article by Scott Meyers and Andrei Alexandrescu to find why the sample code you've got fails. The article does provide a sample of thread-safe singleton. Yes, it does suffer from performance issue you are trying to solve with...

C++98

singleton

Robust C++: Singletons

25 Nov 2020 by Greg Utas

Yet another article on this topic?!

Application Architecture - What's The Matter With Being STUPID Before Being SOLID

24 Apr 2017 by Habibur Rony

This topic will cover the bad design practice using STUPID and good design practice using SOLID. Detailed explanation for Single Single Responsibility Principle, Open and Closed Principle, Liskov Substitution Principle, Interface Segregation Principle and Dependency Inversion (DI) Principle.

Localize an Application at Runtime

27 Apr 2015 by HiDensity

Localization of an application at runtime - "On the fly"

Java

localization

singleton

How to pass data from 1 client to another trugh server?

20 Oct 2013 by tdcmystere

Hello, First of all sorry for my english. My Case: I have an application to query Active directory and some log files and show the output in a nice GUI. This app help many of my colleges to get information about users. I would like to be able to notify my stuff about one of...

singleton

server

ReaderWriterLock FTW!

27 Feb 2012 by StevenLJackson1

Describes the .NET ReaderWriterLock object and how to use it effectively to create a thread safe Singleton.

Error using singleton with linq to sql execting stored procedure

21 Nov 2013 by kingsa

Hi All , I was tried to work with wcf service using singleton pattern getting error 'System.Data.Linq.DataContext' does not contain a constructor that takes 0 argumentscan u guide how to solve this error , using System;using System.Data;using...

SQL-Server

ASP.NET

singleton

A Singleton Application with Interprocess Communication in C#

1 May 2020 by honey the codewitch

Creating an application that can run once, but then accept command line args from subsequent runs

Singleton Pattern in action?

22 Mar 2013 by Akhil Mittal

Can any one give me the best example of when to use singleton pattern.Don't discuss how to use , only discuss when and why to use??

Design

singleton

patterns

Singleton Pattern : Load Balancer Demonstration

30 Jul 2012 by PratapReddyP

Singleton Pattern : This is a pattern which is widely used when there is a situation to create only one instance of a class.Lets demonstrate the pattern using a simple example. Earlier i used to wonder how load balancer servers work.

singleton

Singleton Design Pattern in C#: Part 1

8 Jan 2018 by Akhil Mittal

This article covers Singleton Pattern in the most simplistic and easy to understand. The article will also talk about Static classes and the differences between singleton design pattern and static classes.

Singleton Design Pattern in C#: Part 2

9 Jan 2018 by Akhil Mittal

In this article, we’ll discuss Lazy initialization, the lazy keyword, why you make singleton class a sealed class and what are the differences between singleton and static class.

VS2013

singleton

common Singleton Pattern implementation using Generic

17 Oct 2011 by omid rezaei hanjani

Customized implementation of the Singleton pattern using Generics.

Easily Create a Singleton Application in C#

1 May 2020 by honey the codewitch

This tip demonstrates how to create an app that only allows one instance to run at a time

Singleton

11 Oct 2013 by ASP.NET Community

Singleton The Singleton Design Pattern ensures that only a single instance of a given object can exist.It does this by making the class

singleton

patterns

LNK2019 error while using static variable

2 Dec 2014 by Member 11279587

class Single{private: Single();public: static Single& Single::Instance() { static Single the_instance; return the_instance; }};int main(){ cout

C++

singleton

How to consume Singleton class

20 Nov 2013 by Jobless Creature

Just try Singleton.display("input string").. For singleton, you can consume as classname.methodname()..does this help?

WCF

ASP.NET

singleton

simple Asp.net singleton

26 Oct 2011 by rj45

simple Asp.net singleton

ASP.NET

singleton

How do i...create a singleton C# form

7 Jan 2017 by Member 10850253

I have a C# windows Form application that creates multiple instances of the same window, when I double click the shortcut, but I only want one single instance of the window.Can someone please tell me how to accomplish this?Thanks.What I have tried:I tried what was described in this...

form

singleton

How do i...create a singleton C# form

7 Jan 2017 by Member 10850253

I did this in program.cspublic static bool bf = false; static void Main() { foreach (Form form in Application.OpenForms) { if (form.Name == "BatteryMonitorForm") { bf = true; ...

form

singleton

What is singleton and why we have to use

25 Apr 2018 by Prashanth Shridharchar

Hi all, i'm new to Singleton design pattern, if can ANYONE EXPLAINS or quick understanding of what is Singleton design pattern and how should i use for simple web application or anything. What I have tried: Tried with ONLINE EXAMPLE but did not understood

Which design pattern is used for session design pattern?

28 Jun 2021 by Ishmeet Kaur

I Have got two answers for the internet Singleton and Factory design pattern? Which should we use? Both of them? and Why? What I have tried: I Have got two answers for the internet Singleton and Factory design pattern?

How to consume Singleton class

20 Nov 2013 by kingsa

Hi All, I am new to singleton class how to call the display method can u guide or send snippets public sealed class Singleton{ private static readonly Lazy lazy = new Lazy(() => new Singleton()); public static Singleton Instance { get...

WCF

ASP.NET

singleton

Serial Port Data access in all windows forms

14 May 2014 by Mohammad Reza Valadkhani

if i were you i would write windows Service for handling serial port and then use some key points for communication between windows form and windows service application.but for your case it`s better to write up your code then guys can help you.

Serial Port Data access in all windows forms

25 May 2014 by RAHUL(10217975)

I made SerialPort reader into a separate static class. Then I created a datareceive event in that class and fire it every time data is received. And that event I subscribe in each form and now when I scan the card datarecived event is firing in every form.

Singleton Pattern in Web Application C# ASP.NET

26 Sep 2014 by vinay digil

whats the role of singleton pattern in web application?10 requests from different users for log in how it will be used?instance will 10=1 or 10=10?if 10=1? how it will be handled?if 10=10? how it will be? where the instance is get stored? in case of web.

C#5.0

ASP.NET

singleton

Singleton Pattern In 3 Tier Architecture

2 Mar 2017 by Vijai Anand.G

Hope this will help you.Using Singleton Pattern you can Ensure only one Instance of Object is Created.It can be used as Global Access point.For Example Scenario, we can use Singleton Pattern for...

ASP.NET

singleton

Detail explanation of singleton drawbacks

4 May 2017 by maverick1991

Hi All, I have been reading singleton pattern,it's advantages and disadvantages. Since I am new to this I am not able to understand the detailed nature of disadvantages. Can someone please explain in detail the disadvantages of singleton with any example if possible. eg: 1. How do they deviate...

singleton