What is single instance application?

How do I make an application a single instance?

How To Run A Single Instance Of Your Application1Create a class file named SingleInstance. cs in your project. public sealed class SingleInstance. { public static bool AlreadyRunning() ... 2Step2. Create a class file named User32API. cs. using System.Runtime.InteropServices; ... 3Implement this in our application.

How to make Single instance application in C#?

Using the code FrmMain is the main form class name. The Run method returns false if any other instance of the application is already running. For a console based application, call Run( ) without any parameter and check the return value, if it is true you can execute your application.

How do I run a single instance of the application using Windows Forms?

" This feature is already built in to Windows Forms. Just go to the project properties and click the "Single Instance Application" checkbox. "