c# - "An operations error occurred" from DirectoryServices -

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i'm trying use system.directoryservices query active directory server, using ldap. code can (apparently) connect , authenticate, when first directorysearcher findall() method called, get:

[directoryservicescomexception (0x80072020): operations error occurred.]

picking apart exception in debugger has been remarkably unproductive. seems have pretty no other information associated it. online docs aren't helping me, either.

i'm sure it's i'm doing wrong, what? there way tell kind of problem is?


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