Question

As I know Application.Restart() restarts an application and creates new Instance of an Application. Does this instance will creates in new process, or old process will be used?

Thanks for an answer.

Answer 1

It runs in a new process. The documentation seems a little unclear on whether or not the process is reused but it can be verified by showing the process ID in a text box at start up.

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        Application.Restart();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        textBox1.Text = Process.GetCurrentProcess().Id.ToString();
    }
}

You can also see using .NET Reflector that a new process is created:

public static void Restart()
{
    // ...
    ExitInternal();            // Causes the application to exit.
    Process.Start(startInfo);  // Starts a new process.
    // ...
}