<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style TargetType="Button" x:Key="foxbutton">          
        <Setter Property="Background" Value="Green"/>
    </Style>
    <Style x:Key="EllipseButton" TargetType="{x:Type Button}">
        <Setter Property="Height" Value="100"/>
        <Setter Property="Width" Value="100"/>
        <Setter Property="Template">            
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <Grid>
                        <Ellipse>
                            <Ellipse.Effect>
                                <BlurEffect Radius="23"/>
                            </Ellipse.Effect>
                            <Ellipse.Fill>
                                <RadialGradientBrush>
                                    <GradientStop Color="#FFEB1C1C" Offset="0"/>
                                    <GradientStop Color="#B2DA3361" Offset="1"/>
                                </RadialGradientBrush>                            
                            </Ellipse.Fill>
                            <Ellipse.Stroke>
                                <LinearGradientBrush EndPoint="0.5,1" MappingMode="RelativeToBoundingBox" StartPoint="0.5,0">
                                    <GradientStop Color="#FFC6EF18" Offset="0"/>
                                    <GradientStop Color="#FFDA1F97" Offset="1"/>
                                </LinearGradientBrush>
                            </Ellipse.Stroke>
                        </Ellipse>
                        <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>            
        </Setter>
        <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter Property="Foreground" Value="Red"/>
            </Trigger>
        </Style.Triggers>
    </Style>
</ResourceDictionary>