Do you have use the System.Search once?

DuplicatePolicy Policy for eliminating duplicate search results from a collection. DuplicateResultsCollection A collection of duplicate SearchResult objects and the primary search result from the list of duplicates ExpansionInfo Information returned from the ISearchProvider.Search API describing the state of a query's expansion. ExpansionPolicy Define how interpretations are expanded. Interpretation Interpretation. InterpretationCollection Collection of interpretations. OnlineHelpProvider ResultPropertyCollection Collection of properties and friendly names for the search provider to return SearchBias Define a bias towards an object of a particular type that meets the restrictions. SearchBiasCollection Collection for managing biases. SearchBiasConstraint Constraint between some biases. SearchBiasConstraintCollection Collection of bias constraints. Searcher This class allows for searching over multiple search providers. SearchFilter Define the type and restrictions allowed for a search result. SearchFilterCollection Collection for managing filters. SearchFilterRange Descrbie how to expand interpretations from a particular filter. SearchFilterRangeCollection Collection of filter ranges. SearchManager Expand interpretations from a search into results. SearchProgressEventArgs Search progress returned in event. SearchProgressException An exception that is thrown when a non-fatal error occurs during result expansion. SearchProviderCollection Collection of ISearchProvider objects. SearchRange Range restrictions on a search provider. SearchRangeCollection Collection of SearchRanges. SearchResult Search result for URIs. SearchResultCollection The SearchResultCollection is a simple collection of SearchResult objects. SearchResultCollectionChangeEventArgs Collect changed arguments returned in the SearchResultCollectionChangeEvent. StoreResult Store result represents pairs of store objects and their association matching info. StoreResultCollection A collection of storeResult objects. Each of the StoreResult in the StoreResultCollection has a storeObject reference. StoreResultCollectionDictionary A collection of storeResults collection grouped by scopingType. Basically, this is a hash table with the key being the scoping or the outer type name and the value is the collection of StoreResult objects. The map is indexed by the scoping type and will return a StoreResultCollection which has individual StoreResults with each of which has a object reference. ValueInvoker Closure over a field/property/method with arguments.