# Mk0.Tools.SingleInstance (C) 2019 mk0.at With this code you are able to make your application a single instance. Usage example: static void Main(string[] args) { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); SingleApplication.Run(new MainForm(), Demo.Properties.Settings.Default.singleInstance); } MainForm is the form to show on start singleInstance is an optional boolean value, where you can enable/disable SingleInstance within your application settings