WPF: Textblock Vs Label

In WPF both textblock and level are used to show a small amount of text means visually both snippets produce the same UI. But there is big difference between the two:

TextBlock lives in the System.Windows.Controls namespace, it is not a control. It derives directly from FrameworkElement. TextBlocks are used in a lot of controls to display text.

Label, on the other hand, derives from ContentControl means that label can: be given a custom control template (viaTemplate property), Display data other than just a string (via Content property), Apply a DataTemplate to its content (via ContentTemplate property), and can do whatever else a ContentControl can do that a FrameworkElement cannot. It supports access keys.

Label vs TextBlock (class hierarchy)
Label vs TextBlock (class hierarchy) 


If you want to use styles in WPF correctly (and you need to modify the margin, etc), It is recommend to use a Label instead of a TextBlock. TextBlocks are used inside a lot of controls, and modifying the TextBlock style has a major impact on how most controls (such as a Button, ComboBox, GridView Columns, etc) behave.

So, if you want to display text as a control itself, always use Label. The benefits of showing styles correctly (and have more control over styles and themes) are better than the fact that a TextBlock is lighter.

Next Recommended Reading WPF Layout: Margin Vs Padding