Run Only One Copy Of Application

This Article allow you to run only one Instance of application at a time.
Many time we have requirement that we need to run only one instance of application at a time. If you have same requirement then in that case this article might be useful for you.
Here you will learn how to handle only one instance of application by using Mutex

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Threading;
namespace OnlyOneInstance
    static class Program
        static void Main()
            bool instantiated;
          /* If instantiated is true, this is the first instance of the application; else, another instance is running. */
            Mutex mutex = new Mutex(true, "UniqueID", out instantiated);
            if (!instantiated)
                MessageBox.Show("Already Running");
            Application.Run(new Form1());

Reference Link:- ClickHere to Reference Link
Click here to Download SampleCode.
After Downloading SampleCode, go to the bin directory and then click on OnlyOneInstance.Exe file twice.
you will see a message box is prompted with a message box that Stated Program is “Already Running”

Enjoy Coding 🙂


About Ravi Ranjan Kumar

An Indian who Living, Loving & Learning Technology with different tastes and willing to share knowledge and thoughts.
This entry was posted in .Net, C#, Tips&Tricks and tagged , , . Bookmark the permalink.

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