对DotLucene合并索引库的例子

             string  indexDirectory1  =  Server.MapPath( " index/1000000-1200000/ " );            Directory directory1  =  FSDirectory.GetDirectory(indexDirectory1,  false );             string  indexDirectory2  =  Server.MapPath( " index/1200000-1400000/ " );            Directory directory2  =  FSDirectory.GetDirectory(indexDirectory2,  false );             string  indexDirectory3  =  Server.MapPath( " index/1400000-1600000/ " );            Directory directory3  =  FSDirectory.GetDirectory(indexDirectory3,  false );             string  indexDirectory4  =  Server.MapPath( " index/1600000-1800000/ " );            Directory directory4  =  FSDirectory.GetDirectory(indexDirectory4,  false );             string  indexDirectory5  =  Server.MapPath( " index/1800000-2000000/ " );            Directory directory5  =  FSDirectory.GetDirectory(indexDirectory5,  false );             string  indexDirectory6  =  Server.MapPath( " index/2000000-2190713/ " );            Directory directory6  =  FSDirectory.GetDirectory(indexDirectory6,  false );             string  indexDirectory  =  Server.MapPath( " index/Merge/ " );            StandardAnalyzer analyzer  =   new  StandardAnalyzer();            Lucene.Net.Index.IndexWriter writer  =   new  Lucene.Net.Index.IndexWriter(indexDirectory, analyzer,  false );            writer.AddIndexes( new  Directory[]  ... {directory1, directory2, directory3, directory4, directory5, directory6} );                        DateTime start  =  DateTime.Now;             try              ... {                writer.Optimize();            }              finally              ... {                writer.Close();            }             Response.Write( " 优化索引费时( "   +  (DateTime.Now  -  start)  +   " ) " );