XAML – Add Newline or line break in the Text attribute of TextBlock
<TextBlock Text ="DeveloperPublish.com 
 @isenthil"/>
XAML - Use LineBrake
<TextBlock>
DeveloperPublish.com
<LineBreak/>
@isenthil
</TextBlock>
XAML - How to display a text in XAML which contains double and single quotation marks
You should encode the special characters:
<TextBlock Text='You shouldn't choose "Copy if New":'/>
- ' for '
- " for "
Reference:
