Xamarin Forms:如何正确地将两个视图模型中的数据绑定到单个视图？

<!-- 视图 -->
<ContentPage x:Name="MyPage">
    <StackLayout>
        <Label Text="{Binding ViewModel1.Property1}" />
        <Label Text="{Binding ViewModel2.Property2}" />
    </StackLayout>
</ContentPage>

// 视图模型
public class ViewModel1 : INotifyPropertyChanged
{
    private string property1;
    public string Property1
    {
        get { return property1; }
        set
        {
            if (property1 != value)
            {
                property1 = value;
                OnPropertyChanged(nameof(Property1));
            }
        }
    }

    // INotifyPropertyChanged接口实现
    public event PropertyChangedEventHandler PropertyChanged;
    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

public class ViewModel2 : INotifyPropertyChanged
{
    private string property2;
    public string Property2
    {
        get { return property2; }
        set
        {
            if (property2 != value)
            {
                property2 = value;
                OnPropertyChanged(nameof(Property2));
            }
        }
    }

    // INotifyPropertyChanged接口实现
    public event PropertyChangedEventHandler PropertyChanged;
    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}

// 在视图中设置数据上下文
MyPage.BindingContext = new { ViewModel1 = new ViewModel1(), ViewModel2 = new ViewModel2() };