How can I display a TextBlock only after pressing a button?

Question

I would like to display a screen Texblock, only after pressing the button. If I do a simple code as well, the text is always displayed instead. How do I hide it? I have to work in the code behind?

<Button Content="Inizia" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="145,78,0,0" Click="Inizia"/>
        <StackPanel Margin="0,155,0,0">
            <ScrollViewer VerticalScrollMode="Enabled" Width="360">
                <TextBlock Text="Vedo nuvole in viaggio 
                                 che hanno la forma delle cose che cambiano, 
                                 mi viene un po' di coraggio 
                                 se penso che le cose poi non rimangono mai " Height="331" Width="361" FontSize="16"/>
            </ScrollViewer>
        </StackPanel>

Answer 1

in the xaml set the Visibility property of your Textbox to Hidden or Collapsed

in the buttons click event set the it to Visible , you will need to add a Name to the Textbox so you can access it in the code behind

Difference between Collapsed and Hidden :
if you set it to Collapsed it won't be visible and won't take any space either
if you choose for Hidden it won't be visible but will still take in space

To do it in the xaml reference this answer on a different post

Here 'sa example on how to do it in the code behind

Answer 2

So Basicly You need to add a Name for Your TextBox like this:

<TextBox x:Name="MyTextbox" Visibility="Hidden" Click="button_click"/>

And then in Your eventhandler for button click event:

button_click(object sender, EventArgs e)
{
    MyTextbox.Visibility = System.Windows.Visibility.Visible;
}