How to change the text inside a textblock after clicking a button c#

Question

I have a button that once clicked should change the contents of my TextBlock.

This is the code for my button:

private void activatell_Click(object sender, RoutedEventArgs e)
{

        activeclick = activeclick + 1;
        boolactive = true;
        //TextBlock change here
        if (activeclick == 2)
        {
            activatell.IsEnabled = false;
        }
    }

Answer 1

How to set text of existing TextBlock dynamically