C#

private void button1_Click(object sender, EventArgs e)
       {
           backgroundWorker2.RunWorkerAsync();
       }
       public void additem(int i)
       {
           listBox1.Items.Add(i);
       }

       private void backgroundWorker2_DoWork(object sender, DoWorkEventArgs e)
       {
           for (int i = 0; i < 10; i++)
           {
               additem(i);
               Thread.Sleep(500);
           }

       }

delegate void SetUpdatesCallback();

public void ButtonUpdatesPerformClick()
{
    if (this.buttonUpdates.InvokeRequired)
    {
        SetUpdatesCallback button = new SetUpdatesCallback(this.ButtonUpdatesPerformClick);
        this.Invoke(button, new object[] { });
    }
    else
    {
         this.buttonUpdates.PerformClick();
    }
}
private void buttonUpdates_Click(object sender, EventArgs e)
{
    this.NonButtonUpdates();
}
private void NonButtonUpdates()
{
    this.GoToWebsiteGetData();
}

// CA.cs
public static class A
{
public static void Show()
{
string myFile = .... // here should read where the code is i.e c:\myproject\CA.cs
Console.WriteLine(myFile);
}
}