c# - Getting error when trying to delete a file in asp.net -

i have html data in literal , make pdf file scan.pdf html using itextsharp .but when try delete created pdf file using file.delete() method,it shows error like

d:\hosting\filepath\scan.pdf' because being used process

how can solve it?

this code creating pdf file html , send mailid attachment

   string mailformat = searchdt.rows[0][1].tostring();             emalbody.append(mailformat);             emalbody.replace("[date]", datetime.today.tostring());             string emailbody = emalbody.tostring();             message.body = emalbody.tostring();             ***htmltopdf(emailbody, "scan.pdf");***             system.net.mail.attachment attachment;             attachment = new system.net.mail.attachment(server.mappath("scan.pdf"));             message.attachments.add(attachment);             message.isbodyhtml = true;             message.subject = "";             smtpclient.send(message);             file.delete("d://filepath//scan.pdf");     public void htmltopdf(string html, string filepath)    {    document document = new document();    pdfwriter.getinstance(document, new filestream("d:\\filepath\\scan.pdf",filemode.create));     document.open();      itextsharp.text.html.simpleparser.stylesheet styles = new itextsharp.text.html.simpleparser.stylesheet();     itextsharp.text.html.simpleparser.htmlworker hw = new itextsharp.text.html.simpleparser.htmlworker(document);     hw.parse(new stringreader(html));     document.close();     } 

you're not disposing resources after produce pdf file. it's done calling "close" and/or "dispose" methods on corresponding objects.

if object implements idisposable, can use using construct. way resources freed once execution passes using block (this guarantees resources freed if there's exception inside using block).