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Can I specify a style that applies to all elements? I tried
<Style TargetType="Control"> <Setter Property="Margin" Value="0,5" /> </Style> But it did nothing
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FindName method of FrameworkElement class is used to find elements or controls by their Name properties. The FrameworkElement class is mother of all controls in WPF.
The most common way to declare a style is as a resource in the Resources section in a XAML file. Because styles are resources, they obey the same scoping rules that apply to all resources. Put simply, where you declare a style affects where the style can be applied.
The TextBlock control provides flexible text support for UI scenarios that do not require more than one paragraph of text. It supports a number of properties that enable precise control of presentation, such as FontFamily, FontSize, FontWeight, TextEffects, and TextWrapping.
The Style you created is only targeting Control and not elements that derive from Control. When you don't set the x:Key it's implicitly set to the TargetType, so in your case x:Key="{x:Type Control}".
There isn't any direct way to specify a Style that targets all elements that derive from the TargetType of the Style. You have some other options.
If you have the following Style
<Style x:Key="ControlBaseStyle" TargetType="{x:Type Control}"> <Setter Property="Margin" Value="50" /> </Style> You can target all Buttons for example
<Style TargetType="{x:Type Button}" BasedOn="{StaticResource ControlBaseStyle}"/> or use the style directly on any element, e.g. Button
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