WPF 更改 ViewModel.PropertyChanged 事件上的按钮内容

public class MyViewModel : INotifyPropertyChanged
{
    private string buttonContent;

    public string ButtonContent
    {
        get { return buttonContent; }
        set
        {
            if (buttonContent != value)
            {
                buttonContent = value;
                OnPropertyChanged(nameof(ButtonContent));
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }

    public void OnButtonContentChanged()
    {
        // 更新ButtonContent属性的值
        ButtonContent = "新的按钮内容";
    }
}

<Button Content="{Binding ButtonContent}" />