WPF C#如何在另一个UserControl的UserControl中更改按钮的文本？

<UserControl x:Class="MyUserControl"
             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" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <Button x:Name="myButton" Content="按钮" />
    </Grid>
</UserControl>

using System.Windows.Controls;

public partial class MyUserControl : UserControl
{
    public MyUserControl()
    {
        InitializeComponent();
        
        Button myButton = this.FindName("myButton") as Button;
        myButton.Content = "点击我";
    }
}