该对象当前正在其它地方使用

Question

我要做一个WinForm程序,当我单击列表中的某一条记录的时候,WinForm自动加载显示与该条记录相关的数据信息，为了有更好的用户体验，我在WinForm程序加载相关数据的时候显示等待对话框，过程序相关代码如下：public void FillSbjForStudent()
{
            if (bASStudentBindingSource.Current != null)
            {
                DataRowView dr = (DataRowView)this.bASStudentBindingSource.Current;
                BASStudentManager manger = new BASStudentManager();
                ThreadStart starter = delegate
              {
                  manger.FillBASSbjForStudent(this.dsSbjForStudent.BASSbjForStudent, new Guid(dr["StudentID"].ToString()));
              };
                loading.Loading(starter);
            }
}public class BASLoading
    {
        public static bool IsOpen = false;        public void Loading(ThreadStart starter)
        {
            #region 加载数据动态效果
            try
            {
                TBI.BaseUserControl.FrmLoading frm = new FrmLoading();
                IsOpen = false;                                starter += delegate {
                    while (true)
                    {
                        
                        if (IsOpen)
                        {
                            frm.Close();
                            break;
                        }
                        
                    }
                };
                Thread th = new Thread(starter);
                th.Start();
                frm.ShowDialog();
            }
            catch(Exception ex)
            {
                
            }
            #endregion
        }
    }运行的时候，偶尔会出现如题目所示的错误提示各位大牛，这个问题该怎么解决呢？

Answer 1

starter中做什么了，报错时出现在哪里，线程中有没有加锁，造成访问冲突

Answer 2

声明一个静态变量：
private static readonly object lockder = new object();starter += delegate {
                    lock(locker)
{while (true)
                    {
                        
                        if (IsOpen)
                        {
                            frm.Close();
                            break;
                        }
                        
                    }
                }
};