How do I run some methods and functions of an application after restarting the application automatically

Question

I have a C# application, some times I need to restart my application and after that, I need to run some commands and change some variables of my C# application. I restart my application from this below code:

Application.Restart();
Environment.Exit(0);

I need to insert some codes here to run after exiting.

Answer 1

You can create a flag in application settings and then process it on startup:

//Set a flag on restart
Properties.Settings.Default.IsRestarting = true;
Properties.Settings.Default.Save();
Application.Restart();

...
//Process it on startup (e.g. Main method or Form.Load event for the main form)
if(Properties.Settings.Default.IsRestarting) 
{
    // run some commands and change some variables here
    Properties.Settings.Default.IsRestarting = false;
    Properties.Settings.Default.Save();
}

Alternatively, you can store this flag anywhere you want: file system, registry, database, etc.

You can also, use Process.Start instead of Application.Restart to run another instance of your app. This way you can interact with a new process: send command line arguments, pass messages.

Also, see: Why is Application.Restart() not reliable?