C#

gajesh wrote:

How to pass a const value by reference.

const int answer = 42;
SetData(ref answer);

void SetData(ref parameter) { ... }

gajesh wrote:

How to use const member function in C#.

Guffa wrote:

Methods are always constant, you can never change the definition of a method at runtime.

private void MainForm_Load(object sender, System.EventArgs e)
{
    // Insert code to determine whether logfile is 
    // available.

    if (LogFileIsNotAvailable)
    {
        this.Close();
    }
}

public partial class MainForm : Form
{
    public MainForm()
    {
        InitializeComponent(); <br> <br>

        // Code to determine whether to close form <br>
        
        if (ShouldClose)
        {
            Application.Idle += new EventHandler(Application_Idle);
        }
    } <br> <br>

    void Application_Idle(object sender, EventArgs e)
    {
        this.close();
    }
}

Application.Run(new MainForm());

Thread wat = new Thread(GetData);

// This next line is required since you're going to be 
// creating UI controls on the thread.
wat.SetApartmentState(System.Threading.ApartmentState.STA); 

// This next line will prevent the application from exiting if the background thread is still running.
wat.IsBackground = false;

wat.Start();

...

void GetData()
{
   form.ShowDialog();
}