var indexSearcher = new IndexSearcher(indexDirectory); // perform search operations indexSearcher.Close();In this example, we create a new instance of the `IndexSearcher` class and perform some searches. After we are done with the searches, we call the Close method to release resources associated with the search index. The `Close` method is part of the Lucene.Net.Search namespace, which is part of the Lucene.Net package library. Overall, the `Close` method is a simple but important method to use when you are working with the Lucene.net library for search operations. It allows you to clean up resources and ensure that you are not holding on to any unnecessary resources after performing search operations.