App.xaml

<Application x:Class="Kiroll.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         DispatcherUnhandledException="App_OnDispatcherUnhandledException"
         StartupUri="MainWindow.xaml">
    <Application.Resources>

        <!--Button Letter Over style-->
        <Style x:Key="OverButtonLetter" TargetType="Button">
            <Setter Property="OverridesDefaultStyle" Value="True"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border Name="border" 
                        BorderThickness="2"
                        BorderBrush="Transparent" 
                        CornerRadius="10" 
                        Background="{TemplateBinding Background}">
                            <ContentPresenter Name="content" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="border" Property="BorderBrush" Value="Black" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <!--End Button Letter Over style-->

        <!--Button Dot Over style-->
        <Style x:Key="OverButtonDot" TargetType="Button">
            <Setter Property="OverridesDefaultStyle" Value="True"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border Name="border" 
                        BorderThickness="2"
                        BorderBrush="Transparent" 
                        CornerRadius="10" 
                        Background="{TemplateBinding Background}">
                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Top"/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="border" Property="BorderBrush" Value="Black" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <!--End Button Dot Over style-->

        <!--Button Dot Over (Horizontal) style-->
        <Style x:Key="OverButtonHorizontalDot" TargetType="Button">
            <Setter Property="OverridesDefaultStyle" Value="True"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border Name="border" 
                        BorderThickness="2"
                        BorderBrush="Transparent" 
                        Padding="0,25,0,0"
                        CornerRadius="10" 
                        Background="{TemplateBinding Background}">
                            <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Top"/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="border" Property="BorderBrush" Value="Black" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <!--End Button Dot Over style-->

    </Application.Resources>
</Application>