WPF - Global Style?

Well, sort of - it's a catch-all approach you can do - put the following element in your App.xaml - all your buttons will change (except the ones you apply a style to, manually).

<Style TargetType="{x:Type Button}">    <Setter Property="Background" Value="LightPink"/> <!-- You should notice that one... --></Style>

However, if you want to hit only buttons with images - you have to inherit from Button everytime you do and then apply a style like this:

public class CustomImageButton:Button{}<Style TargetType="{x:Type local:CustomImageButton}">    <Setter Property="Background" Value="LimeGreen"/></Style><local:CustomImageButton Content="ClickMe"/>

It is a very coarse-grained global styling - and you need to follow the convention to make it work.

An alternative is to use Themes - read more about that here.

You can do implicit styles in WPF which are applied by type

for instance

<Style TargetType="Button">

Will be applied to ALL the buttons within the scope of that style (If the style is in App.XAML it will apply to all buttons, if it is lower in the chain it will apply to all buttons underneath it)

If you want to apply it to only certain types of buttons (say imagebuttons) create a type that derives from button (call it ImageButton) and then create a style targeted to that type.

Put the style into a ResourceDictionary tag inside your App.xaml and it will apply to the entire app.