Change WPF mainwindow label from another class and separate thread

I resolved my question, hope somebody will need this. But don't know whether this is the optimized way.

In my mainWindow.xaml.cs :

    public  MainWindow()
    {
      main = this;
    }

    internal static MainWindow main;
    internal string Status
    {
        get { return status_lable.Content.ToString(); }
        set { Dispatcher.Invoke(new Action(() => { status_lable.Content = value; })); }
    }

from my SignIn.cs class

 MainWindow.main.Status = "Irantha has signed in successfully";

This works fine for me. You can find more details from here, Change WPF window label content from another class and separate thread

cheers!!

try below snippet:

status_lable.Dispatcher.Invoke(...)

Thanks to the answers, they led me in the right direction. I ended up with this simple solution:

public partial class MainWindow : Window
{
    public static MainWindow main;

    public MainWindow()
    {
        InitializeComponent();                        
        main = this;
    }
}

Then in my eventhandler in another class that runs in a different thred:

internal static void pipeServer_MessageReceived(object sender, MessageReceivedEventArgs e)
    {
        MainWindow.main.Dispatcher.Invoke(new Action(delegate()
        {
            MainWindow.main.WindowState = WindowState.Normal;
        }));
    }

This to show the minimized window when i message is received via a namedPipeline.