Can anyone provide an example of how to loop through a System.DirectoryServices.PropertyCollection and output the property name and value? I am using C#. @JaredPar - The PropertyCollection does not Checking if a generic collection is empty with Linq and C# 23 January 2013 Posted in Generics, Linq, c#. This is a common issue for many developers. How do you quickly and efficiently determine whether a given non-null collection contains any valid non-empty elements . Directory Searcher SearchResultCollection.count Is Very Slow Feb 15, 2011. I have a directory searcher that is looking for dynamic groups.When I try to process the results it is taking 30 seconds to return the results.the ds.findall is very fast but when I try to find out the number of records returned or anything about the results it take the 30 seconds. Download the latest Linq to AD from codeplex LINQ to Active Directory. It expands a demo project and the main library project BdsSoft.DirectoryServices.Linq. Create a new blank solution and add the BdsSoft.DiretoryServices.Linq project into it. Create a new project to consume the library. In the new project add these references How to use LINQ to find if any Value in a ResultPropertyCollection contains a certain substring? Background: After a renaming of my employer firm, I want to check whether all users have a proper new email alias, which are listed in Active Directory as proxyAddresses. Since I loaded in memory a wrapper for each object, I can issue LINQ queries against the AdUsers, because I can rely on the support of Linq 2 Object, simply making AdUsers implementing IEnumerable. Since everything is in memory we can issue condition like u.UserName.Contains(â€œampâ€ ) or whatever you like. The managed wrapper doesn't really leak anything. If you don't call Dispose unused resources will still be reclaimed during garbage collection.. However, the managed code is a wrapper on top of the COM-based ADSI API and when you create a DirectoryEntry the underlying code will call the ADsOpenObject function.The returned COM object is released when the DirectoryEntry is disposed or during It appears that the context of your code is to get the active directory user of a person requesting a page using WCF or ASP.NET. There's no need to pull every single user out of Active Directory and then use a lambda expression as a filter.
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