PrincipalSearcher.FindOne Method ()
Returns a principal search result that contains the first principal object found that matches the principal specified in the QueryFilter property.
Assembly: System.DirectoryServices.AccountManagement (in System.DirectoryServices.AccountManagement.dll)
A QueryFilter must first be assigned to the principal searcher before the query can be performed.
If there is exactly one match of the object specified in the QueryFilter, this method returns that object. If there are multiple matches of the QueryFilter object, this method arbitrarily returns one of the matching principals.
The Principal object returned from this method matches the type of object contained in the QueryFilter property. The search is conducted in the context specified in the Context property. For more information, see the Query by Example overview topic.
Available since 3.5