怎么获取不到模板中的控件？

[LQ_DaYuRen]

ManagementControl mc = new ManagementControl();
Grid grid = mc.managementRadioButton.Template.FindName("grid", mc.managementRadioButton) as Grid;
if (grid != null)
{
       MessageBox.Show("find it");
}

获取的代码

<UserControl x:Class="crm.view.controls.ManagementControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:crm.view.controls"
             mc:Ignorable="d" 
             d:DesignHeight="40" Background="White">
    <UserControl.Resources>
        <Style TargetType="RadioButton" BasedOn="{x:Null}" x:Key="myRadioButton">
            <Setter Property="Background" Value="Transparent"></Setter>
            <Setter Property="Padding" Value="3 2 3 2"></Setter>
            <Setter Property="BorderThickness" Value="0 0 0 1"></Setter>
            <Setter Property="BorderBrush" Value="#002D96"></Setter>
            <Setter Property="Height" Value="auto"></Setter>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type RadioButton}">
                        <Border BorderBrush="#002D96" BorderThickness="0 0 0 1">
                            <Grid x:Name="grid" VerticalAlignment="Center">
                                <Grid.Background>
                                    <LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
                                        <GradientStop Offset="0" Color="#D1E4FB"></GradientStop>
                                        <GradientStop Offset="1" Color="#8CB0E5"></GradientStop>
                                    </LinearGradientBrush>
                                </Grid.Background>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="40"></ColumnDefinition>
                                    <ColumnDefinition Width="Auto"></ColumnDefinition>
                                </Grid.ColumnDefinitions>
                                <Image Grid.Column="0" x:Name="managementImage"  Height="30"></Image>
                                <Border Grid.Column="1" BorderThickness="{TemplateBinding BorderThickness}" BorderBrush="{TemplateBinding BorderBrush}"  Height="{TemplateBinding Height}" HorizontalAlignment="Center"
                                Background="{TemplateBinding Background}" Width="{TemplateBinding Width}">
                                    <ContentPresenter VerticalAlignment="Center" HorizontalAlignment="Left" Margin="{TemplateBinding Padding}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                </Border>
                            </Grid>
                        </Border>
                        <!--触发器：设置选中状态符号-->
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsChecked" Value="true">
                                <Setter Property="Background" TargetName="grid">
                                    <Setter.Value>
                                        <LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
                                            <GradientStop Offset="0" Color="#FBE491"></GradientStop>
                                            <GradientStop Offset="1" Color="#EF991B"></GradientStop>
                                        </LinearGradientBrush>
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                            <Trigger Property="IsMouseOver" Value="true">
                                <Setter Property="Background" TargetName="grid">
                                    <Setter.Value>
                                        <LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
                                            <GradientStop Offset="0" Color="#FFFDD9"></GradientStop>
                                            <GradientStop Offset="1" Color="#F8C361"></GradientStop>
                                        </LinearGradientBrush>
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </UserControl.Resources>
    <RadioButton Height="40" x:Name="managementRadioButton" GroupName="managementGroup" Style="{StaticResource myRadioButton}"></RadioButton>
</UserControl>

这个是自定义控件，我看了别人的可以获取到，为什么我这样写就看不到，连可视化树都看不见。怎么办？新手上路