如何在将int更改为decimal后更改PdfSharp控制器

我把int改成了decimal？现在我的PdfSharp控制器出现错误

gfx.DrawString(job.JobRetainage.ToString("C",
              new System.Globalization.CultureInfo("en-US")), BodyFont, XBrushes.Black,
             new XRect(460, 160, page.Width, page.Height),
             XStringFormats.TopLeft);

错误消息

方法tostring没有重载，需要2个参数

gfx.DrawString(job.JobRetainage.Value.ToString("C",
          new System.Globalization.CultureInfo("en-US")), BodyFont, XBrushes.Black,
         new XRect(460, 160, page.Width, page.Height),
         XStringFormats.TopLeft);