How to restart program in C#

To start the same program instance as current process and close the current process at the same time. Depending on application types, the implementation might be a little different, but the basic idea is same.

For example:

private void RestartProgram()
{
    // Get the current application's executable path
    var exePath = Assembly.GetExecutingAssembly().Location;
    //var exePath = Application.ExecutablePath;  // for WinForms
 
    // Start a new instance of the application
    Process.Start(exePath);
     
    // For Windows Forms app
    Application.Exit();
                 
    // For all Windows application but typically for Console app.
    //Environment.Exit(0);
}

System.Reflection.Assembly.GetEntryAssembly().Location is used to get the path of the currently executing program.

Process.Start(exePath) starts a new instance of the application.

Environment.Exit(0) ends the current process, effectively "restarting" it by launching a fresh instance.

In WinForms applications, you can use `Application.Restart()` to restart the program.

This approach works well for restarting desktop applications, but may not be suitable for ASP.NET applications or services.