You cannot run a WebBrowser Control-based application to download a file in Internet Explorer 9

Assume that you run a WebBrowser Control-based application to download a file in Internet Explorer 9. Additionally, you use a "Content-disposition: attachment" HTTP header in the WebBrowser Control-based application. In this�situation, the file does not download.

Note�If you change the "Content-disposition: attachment" header to "Content-disposition: inline", this issue does not occur.

Security update information

To resolve this issue, install the most recent cumulative security update for Internet Explorer. To do this, go to the following Microsoft website:
Notes

• This update was first included in the following security update:
  2792100�MS13-009: Cumulative Security Update for Internet Explorer: February 12, 2013
• For more technical information about the most recent cumulative security update for Internet Explorer, go to the following Microsoft websites:
  http://www.microsoft.com/technet/security/current.aspx

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.