The TextBlock Control displays static (read-only) text in a Windows Store app simply by assigning the text in string format to the Text property of the TextBlock control.
<TextBlock Text="Textblock control of winodows store app"></TextBlock>
The text property of the textblock control above will simply output whatever you write in it.
Note: However a TextBlock also provides the ability to display a series of strings in a Textblock with different formatting or break the line of text by using the "Run" and "Linebreak" element.
<TextBlock Text="Textblock control of winodows store app" Foreground="Yellow" FontSize="25" Grid.RowSpan="2">
<LineBreak />
<Run FontFamily="Arial" FontWeight="ExtraBold" Foreground="Red" FontSize="14">Second line text</Run>
<LineBreak />
<Run FontFamily="Gigi" FontSize="15" FontWeight="ExtraBold" Foreground="Blue" >Third line text</Run>
</TextBlock>
Output
Summary
A Textblock is just like the label control of the .Net framework. Both are used to display static text. In a Windows Store app however the label control is not available; instead of the label control, use a Textblock control.