ScrollViewer不在用户控件wpf上工作

我有一个用户控件1和一个页面1，我试图做的是向用户控件1添加一个scrollViewer，但它不起作用

我想知道这件事怎么了

第1页：

<Border BorderThickness="0" x:Name="border1">
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="3*"></ColumnDefinition>
                <ColumnDefinition Width="1.5*"></ColumnDefinition>
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="325"></RowDefinition>
                <RowDefinition Height="*"></RowDefinition>
            </Grid.RowDefinitions>

            <ScrollViewer Grid.Row="0" HorizontalScrollBarVisibility="Visible"  Width="auto" Grid.Column="0">
            <local1:UserControl1  Grid.Row="0" Margin="10,10,10,10" Grid.Column="0" ScrollViewer.HorizontalScrollBarVisibility="Visible" ></local1:UserControl1>
            </ScrollViewer>
        
    </Grid>
    </Border>

 <Grid Background="White">

        <Border  x:Name="border1" BorderBrush="Black" BorderThickness="1"  >
            <TabControl 
            Background="{StaticResource WhiteBruch}"
         x:Name="TabControl1"
         Height="auto"
         BorderThickness="0" >
                <TabItem x:Name="Tab1" 
                     Style="{StaticResource TabItemStyle}">
                    <TabItem.Header>
                        <TextBlock Style="{StaticResource TitleText}"
                        Text="{StaticResource Text1}" 
                        Name="TabItem1"
                        />

                    </TabItem.Header>

                </TabItem>
            </TabControl>

        </Border>    
</Grid>

用户控件1:

<Border BorderThickness="0" x:Name="border1">
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="3*"></ColumnDefinition>
                <ColumnDefinition Width="1.5*"></ColumnDefinition>
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="325"></RowDefinition>
                <RowDefinition Height="*"></RowDefinition>
            </Grid.RowDefinitions>

            <ScrollViewer Grid.Row="0" HorizontalScrollBarVisibility="Visible"  Width="auto" Grid.Column="0">
            <local1:UserControl1  Grid.Row="0" Margin="10,10,10,10" Grid.Column="0" ScrollViewer.HorizontalScrollBarVisibility="Visible" ></local1:UserControl1>
            </ScrollViewer>
        
    </Grid>
    </Border>

 <Grid Background="White">

        <Border  x:Name="border1" BorderBrush="Black" BorderThickness="1"  >
            <TabControl 
            Background="{StaticResource WhiteBruch}"
         x:Name="TabControl1"
         Height="auto"
         BorderThickness="0" >
                <TabItem x:Name="Tab1" 
                     Style="{StaticResource TabItemStyle}">
                    <TabItem.Header>
                        <TextBlock Style="{StaticResource TitleText}"
                        Text="{StaticResource Text1}" 
                        Name="TabItem1"
                        />

                    </TabItem.Header>

                </TabItem>
            </TabControl>

        </Border>    
</Grid>