Brendan Tompkins [MVP]

Blog First. Ask Questions Later.

Fix for System.DirectoryServices error "Operation is not valid due to the current state of the object."

If you use the System.DirectoryServices namespace to do Active Directory stuff, you may have run into this error:

Operation is not valid due to the current state of the object.at System.DirectoryServices.PropertyValueCollection.OnInsertComplete(Int32 index, Object value) at System.Collections.CollectionBase.System.Collections.IList.Add(Object value) at System.DirectoryServices.PropertyValueCollection.Add(Object value)

This problem is mentioned in KB886541, which refers the hotfix in KB35763. This is one of those hotfixes that you have to call in for, but it does in fact fix this error.

Published Feb 10 2005, 12:31 PM by Brendan Tompkins

Filed under: .NET General

Comments

Ivan K said:

Just had this very problem. My code was as follows:

de = new DirectoryEntry(path);
p = de.Properties["propertyName"];
p.Clear();
p.Add(value);
de.CommitChanges();

This worked fine on one machine, but broke with the same problem that you detailed.

I found that if I changed "p.Add(value);" to "p.Value = value;" the problem disappeared. No reason why the first method shouldn't have worked, but at least the workaround saved me from installing the patch. Of course, if you were continually seeing this sort of problem, or there were no adequate workarounds, you might be better off patching your system.

# April 21, 2005 12:52 AM

Vijay said:

Can u be a bit clear...

# October 26, 2007 7:51 AM

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About Brendan Tompkins

Brendan has been programming with .NET since the first public beta and is owner and operator of Port Technology Services, a consultancy company providing .NET application development services to the Maritime industry. In July, 2007, he was awarded the Microsoft MVP award for ASP.NET. He's also a proud co-founder of failed .COM startup Intrinsigo, and has had a hand in the failure of numerous other businesses. He currently runs CodeBetter.Com and Devlicio.us, and lives in Norfolk, Virgina with his wife Tiara and son Ian.