Microsoft KB Archive/826915

= FIX: Marshal.ReleaseComObject Does Not Correctly Release Objects That Implement the IDisposable Interface =

Article ID: 826915

Article Last Modified on 10/25/2005

-

APPLIES TO


 * Microsoft .NET Framework 1.0

-



SYMPTOMS
If events are used from managed code, the Marshal.ReleaseComObject method does not correctly release a COM object that implements the IDisposable interface.



RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next .NET Framework 1.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. Date        Time   Version       Size       File name -- 12-Aug-2003 12:17  1.0.3705.449    200,704  Aspnet_isapi.dll 12-Aug-2003 12:11                    4,169  Aspnet_perf.h 12-Aug-2003  12:18                  513,302  Aspnet_perf.ini 12-Aug-2003 12:18                  510,714  Aspnet_perf2.ini 12-Aug-2003 12:18  1.0.3705.449     24,576  Aspnet_regiis.exe 12-Aug-2003 12:18  1.0.3705.449     28,672  Aspnet_wp.exe 12-Aug-2003 11:40  1.0.3705.449     69,632  Corperfmonext.dll 12-Aug-2003 11:30  1.0.3705.449  1,953,792  Mscorlib.dll 12-Aug-2003 11:31                   10,284  Mscorlib.ldo 12-Aug-2003 11:39  1.0.3705.449  2,269,184  Mscorsvr.dll 12-Aug-2003 11:39  1.0.3705.449  2,269,184  Mscorwks.dll 01-Aug-2002 17:38                       15  Smartnav.htm 29-Jul-2003 16:30                    8,728  Smartnav.js 12-Aug-2003  12:27  1.0.3705.449  1,196,032  System.web.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
This problem prevents the COM object from being released correctly. When the COM object is not released correctly, memory usage grows. Also, semantic problems may occur. For example, some object models will not quit unless all the references are released.

To work around this problem, you can do a full garbage collection to deterministically release the COM objects. However, this method significantly decreases performance.

Keywords: kbbug kbfix kbqfe kbnetframe100presp3fix kbhotfixserver KB826915

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.