如何在c#中保存ExcelPicture？

using Excel = Microsoft.Office.Interop.Excel;

Excel.Application excelApp = new Excel.Application();
Excel.Workbook workbook = excelApp.Workbooks.Add();

Excel.Worksheet worksheet = workbook.ActiveSheet;

string imagePath = "图片文件路径";
Excel.Pictures pictures = worksheet.Pictures(System.Type.Missing) as Excel.Pictures;
Excel.Picture picture = pictures.Insert(imagePath, System.Type.Missing);

picture.Left = 100;  // 设置图片左边距
picture.Top = 100;   // 设置图片上边距
picture.Width = 200; // 设置图片宽度
picture.Height = 200; // 设置图片高度

string savePath = "保存路径";
workbook.SaveAs(savePath);

excelApp.Quit();