There is a known issue with DirectorySearcher where a memory leak is caused if you don't dispose of the objects manually.  I found that there are places in the code where this isn't being done.  When we do a lot of testing with the LDAP methods, our server gets slower and slower.  Once these objects are disposed of properly this isn't a problem.

http://msdn.microsoft.com/en-us/library/system.directoryservices.directorysearcher.findall(v=vs.110).aspx

Hi Rebecca,

  Sorry for the late response. We will implement the dispose method to prevent memory leaks.
 Thanks for the feedback

Cheers,
André Pereira