问题描述(Description)：

When you use the Microsoft Visual Studio 2005 IDE, a lockup condition may occur, and the IDE stops responding (hangs). Additionally, you cannot close the IDE, and you may receive the following error message:

Visual Studio cannot shut down because a modal dialog is open

原因(Cause)：

This problem occurs because Visual Studio 2005 does not reset an internal flag. This flag indicates that Visual Studio 2005 is currently displaying a modal dialog box.

解决方法(Solution)：

To download this hotfix from the MSDN Code Gallery, visit the following Microsoft Web site:

http://code.msdn.microsoft.com/KB936971

REF:

http://social.msdn.microsoft.com/forums/en-US/vsdebug/thread/95d7918a-dab5-450b-a1f7-12b144db453d

http://social.msdn.microsoft.com/forums/en-US/sqlreportingservices/thread/26c6f09e-594d-45ca-b040-805483243544/#page:4

https://connect.microsoft.com/VisualStudio/Downloads/DownloadDetails.aspx?DownloadID=7259

http://support.microsoft.com/kb/936971