<Window x:Class="MyGamePlace.Window2" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Title="MyGamePlace" Height="300" Width="300" 
    > 
  <Window.Resources> 
    <Style TargetType="{x:Type Button}"> 
      <Setter Property="Background"> 
        <Setter.Value> 
            <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> 
              <GradientStop Color="Red" Offset="0.0" /> 
              <GradientStop Color="Black" Offset="1.0" /> 
            </LinearGradientBrush> 
        </Setter.Value> 
      </Setter> 
      <Setter Property="Template"> 
        <Setter.Value> 
          <ControlTemplate TargetType="{x:Type Button}"> 
            <Border Name="Border" Padding="15" CornerRadius="10" Background="{TemplateBinding Background}"> 
              <ContentPresenter Margin="2" HorizontalAlignment="Center" VerticalAlignment="Center" RecognizesAccessKey="True"/> 
            </Border> 
          </ControlTemplate> 
        </Setter.Value> 
      </Setter> 
    </Style> 
  </Window.Resources> 
  <StackPanel> 
    <Button>Button</Button> 
    <Button> 
      <Button.Background> 
        <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> 
          <GradientStop Color="White" Offset="0.0" /> 
          <GradientStop Color="Black" Offset="1.0" /> 
        </LinearGradientBrush> 
      </Button.Background> Button 
    </Button> 
  </StackPanel> 
</Window>