c# – 如何创建形状并使用office Interop在powerpoint的自定义任

目前我已经跟踪了选定的形状,但没有想到如何在自定义任务窗格中保存和显示
????码：

//Microsoft.Office.Interop.PowerPoint;
        PowerPoint.Slide currentSlide = Globals.ThisAddIn.Application.ActiveWindow.View.Slide;
                    if (currentSlide != null)
                    {
                        var selection = Globals.ThisAddIn.Application.ActiveWindow.Selection;

                        if (selection.ShapeRange != null)
                        {
                            var shapecount = selection.ShapeRange.Count;

                            if (shapecount > 0)
                            {
                                for (int i = 1; i <= shapecount; i++)
                                {
                                    var shape = selection.ShapeRange[i];

                                    //want to save and load shape in Custom task pane  for later use.
                                }
                            }
                        }

                    }

我使用了Microsoft.Office.Interop.PowerPoint命名空间,并希望在幻灯片中加载和保存如此形成的形状