public void Items_Add(DownLoadEntity downLoadEntity)
        {
            try
            {
                this.downLoadDataGrid.Items.Add(downLoadEntity);

                this.downLoadEntityList.Add(downLoadEntity);
            }
            catch (Exception ex)
            {
                LogManage.WriteLog(this.GetType(), ex);
            }
            finally
            {
            }
        }
 private void ItemDelste_Click(object sender, MouseButtonEventArgs e)
 {
     try
     {
         Object selectedItem = this.downLoadDataGrid.SelectedItem;
         if (selectedItem is DownLoadEntity)
         {
             DownLoadEntity downLoadEntity = selectedItem as DownLoadEntity;
             downLoadEntity.WebClientHelper.Dispose();
             this.downLoadDataGrid.Items.Remove(downLoadEntity);
         }
     }
     catch (Exception ex)
     {
         LogManage.WriteLog(this.GetType(), ex);
     }
     finally
     {
     }
 }