using Lucene.Net.Store; //Create directory object Directory indexDir = FSDirectory.Open(@"C:\luceneIndex"); //Perform index search operations //Dispose directory object indexDir.Dispose();In the above code, we declare a Directory object which represents the Lucene Index. We perform index search operations using this object and then dispose of it using the Dispose method. This closes all the underlying resources and frees up the memory used by the index. Lucene.Net is a package library for .NET developers that allows them to build search functionality into their applications. The Lucene.Net.Store namespace provides classes for storing and accessing Lucene Indexes.