C# 将数据发送到非父窗口

我有两个分部类，窗口A（frmSchedule）和窗口B（frmadlesson）。窗口A中有一个数据绑定的ListView控件。窗口A打开窗口B，该窗口设计用于创建新的课程对象，我想将该课程数据放回窗口A。我可以通过哪些方法来实现这一点？在C#中是否有一种简单的方法来使用应用程序范围变量

我曾尝试从一个基类派生两个分部类，并使用该类将课程数据传回第一个窗口，但我无法理解：(

有关更多信息，我在这里列出了该计划：

我有一个主窗口（fmrSchedule），其中ListView控件绑定到ObservableCollection： （为了简单起见，我假设Lesson对象只有一条重要的数据）

课程类别：

public class Lesson
{
    public Lesson()
    {
        //Stuff for later
    }

    private int m_Time;

    public int Time { get { return m_Time; } set { m_Time = value; } }
}

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我不知道我怎么没意识到你能做到…非常感谢！我不知道我怎么没意识到你能做到…非常感谢！

public partial class frmSchedule : Window
{        
    public frmSchedule()
    {
        InitializeComponent();

        //ListView sample data
        aLesson = new Lesson();
        aLesson.Time = 9;
        m_myLessons.Add(aLesson);
        lstLessons.ItemsSource = LessonList;
    }

    Lesson aLesson;

    private ObservableCollection<Lesson> m_myLessons = new ObservableCollection<Lesson>();
    public ObservableCollection<Lesson> LessonList { get { return m_myLessons; } }

    //Add Lesson
    private void btnAdd_Click(object sender, RoutedEventArgs e)
    {
        //New frmAddLesson window
        frmAddLesson addLesson = new frmAddLesson();
        addLesson.Show();
    }

public partial class frmAddLesson : Window
{
    public frmAddLesson(System.DateTime? DateTime)
    {
        InitializeComponent();

        dateTime = DateTime;
        radPrivate.IsChecked = true;
    }

    //DateTime from calendar selection
    private DateTime? dateTime;
    //Lesson object
    private Lesson theLesson;

    //ADD LESSON
    private void btnAdd_Click(object sender, RoutedEventArgs e)
    {
        //Create new Lesson object
        theLesson = new Lesson();

        //Set Lesson property
        theLesson.Time = (int)cmbTime.SelectedValue; //Time

        this.Close();
    }
}

public class Lesson
{
    public Lesson()
    {
        //Stuff for later
    }

    private int m_Time;

    public int Time { get { return m_Time; } set { m_Time = value; } }
}

public partial class frmSchedule : Window 
{       
   ...  
   private void btnAdd_Click(object sender, RoutedEventArgs e)  
   {  
    //New frmAddLesson window  
    frmAddLesson addLesson = new frmAddLesson(this);  
    addLesson.Show();  
   }  

   public void AddLesson(Lesson lesson)
   {
     ...
   }
}

public partial class frmAddLesson : Window    
{
  public frmAddLesson(frmSchedule schedule)      
  {      
    InitializeComponent();      

    this.schedule = schedule;

    ...

  }    
  frmSchedule schedule;

  //ADD LESSON    
  private void btnAdd_Click(object sender, RoutedEventArgs e)    
  {    
    //Create new Lesson object    
    var theLesson = new Lesson();    

    //Set Lesson property    
    theLesson.Time = (int)cmbTime.SelectedValue; //Time    

    schedule.AddLesson(theLesson);

    this.Close();    
  }    
}