error occuring due to run projct

You can only access User Interface (or UI) components from the thread they were created on: the UI thread. If you try to access them from a different thread, you will get this error.

The solution is to Invoke the control instead.
Fore exampole, suppose you want to add a new Tab to a Tabpage from a background thread. All you have to do is check, and invoke as necessary:

private void AddNewTab(string tabName)
    {
    if (InvokeRequired)
        {
        Invoke(new MethodInvoker(delegate { AddNewTab(tabName); }));
        }
    else
        {
        TabPage tp = new TabPage(tabName);
        myTabControl.TabPages.Add(tp);
        }
    }