Audit_APP/MainWindow.xaml

<mah:MetroWindow
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Audit"
        xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes" 
        xmlns:mah="http://metro.mahapps.com/winfx/xaml/controls" 
        x:Class="Audit.MainWindow"
        mc:Ignorable="d"
        Background="#FFF5F5F5"
        Title="SUNLIGHT" Height="900" Width="1280" WindowStartupLocation="CenterScreen">
    <mah:MetroWindow.Resources>
        <Style x:Key="RadioButtonStyle" TargetType="{x:Type RadioButton}">
            <Setter Property="Background" Value="{DynamicResource MahApps.Brushes.ThemeBackground}"/>
            <Setter Property="BorderBrush" Value="{DynamicResource MahApps.Brushes.CheckBox}"/>
            <Setter Property="FocusVisualStyle" Value="{DynamicResource {x:Static SystemParameters.FocusVisualStyleKey}}"/>
            <Setter Property="FontFamily" Value="{DynamicResource MahApps.Fonts.Family.Control}"/>
            <Setter Property="FontSize" Value="{DynamicResource MahApps.Font.Size.Content}"/>
            <Setter Property="Foreground" Value="{DynamicResource MahApps.Brushes.Text}"/>
            <Setter Property="HorizontalContentAlignment" Value="Left"/>
            <Setter Property="OverridesDefaultStyle" Value="True"/>
            <Setter Property="Padding" Value="6 0 0 0"/>
            <Setter Property="SnapsToDevicePixels" Value="True"/>
            <Setter Property="Stylus.IsPressAndHoldEnabled" Value="False"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type RadioButton}">
                        <Grid>
                            <Border x:Name="border" Background="{TemplateBinding Background}">
                                <Grid>
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition>
                                        </ColumnDefinition>
                                    </Grid.ColumnDefinitions>
                                    <TextBlock Grid.Row="0" Grid.Column="0" 
                                               Text="{TemplateBinding Tag}" 
                                               FontFamily="Fonts/#FontAwesome" 
                                               HorizontalAlignment="Left" 
                                               Width="40" FontSize="30" Margin="10,10,0,0"/>
                                    <TextBlock Grid.Row="0" Grid.Column="1" 
                                               Text="{TemplateBinding Content}" 
                                               FontFamily="Fonts/#FontAwesome" 
                                               HorizontalAlignment="Center" 
                                               Width="60" FontSize="30" Margin="10,10,0,0"/>
                                </Grid>
                            </Border>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Background" Value="#FFA0A0A0" TargetName="border"/>
                            </Trigger>
                            <Trigger Property="IsChecked" Value="True">
                                <Setter Property="Background" Value="#FFF5F5F5" TargetName="border"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </mah:MetroWindow.Resources>
    <Grid>

        <Rectangle HorizontalAlignment="Left" Height="1105" 
                   Fill="#FFCCCCCC" VerticalAlignment="Top" Width="180"/>

        <RadioButton Content="查询" Tag="&#xF15C;" HorizontalAlignment="Left" 
                     Height="55" Margin="0,190,0,0" VerticalAlignment="Top" Width="180" 
                     Background="#FFCCCCCC" Style="{DynamicResource RadioButtonStyle}"/>

        <RadioButton Content="统计" Tag="&#xF00B;" HorizontalAlignment="Left" 
                     Height="55" Margin="0,245,0,0" VerticalAlignment="Top" Width="180" 
                     Background="#FFCCCCCC" Style="{DynamicResource RadioButtonStyle}"/>

        <RadioButton Content="退出" Tag="&#xF08B;" HorizontalAlignment="Left" 
                     Height="55" Margin="0,745,0,0" VerticalAlignment="Top" Width="180" 
                     Background="#FFCCCCCC" Style="{DynamicResource RadioButtonStyle}" Checked="RadioButton_Checked"/>

    </Grid>
</mah:MetroWindow>