Lucene.Net.Index.IndexWriter.DeleteAll C# (CSharp) Method

		public virtual void  DeleteAll()
		{
			lock (this)
			{
				docWriter.PauseAllThreads();
				try
				{
					
					// Abort any running merges
					FinishMerges(false);
					
					// Remove any buffered docs
					docWriter.Abort();
					docWriter.SetFlushedDocCount(0);
					
					// Remove all segments
					segmentInfos.Clear();
					
					// Ask deleter to locate unreferenced files & remove them:
					deleter.Checkpoint(segmentInfos, false);
					deleter.Refresh();
					
					// Don't bother saving any changes in our segmentInfos
					readerPool.Clear(null);
					
					// Mark that the index has changed
					++changeCount;
				}
				catch (System.OutOfMemoryException oom)
				{
					HandleOOM(oom, "deleteAll");
				}
				finally
				{
					docWriter.ResumeAllThreads();
					if (infoStream != null)
					{
						Message("hit exception during deleteAll");
					}
				}
			}
		}
		

        public void ClearIndex()
        {
            if (System.IO.Directory.GetFiles(this.index.Directory.FullName).Any())
            {
                try
                {
                    var analyzer = new Lucene.Net.Analysis.Standard.StandardAnalyzer(Lucene.Net.Util.Version.LUCENE_30);
                    using (var writer = new IndexWriter(this.index, analyzer, true, IndexWriter.MaxFieldLength.UNLIMITED))
                    {
                        // remove older index entries
                        writer.DeleteAll();

                        // close handles
                        analyzer.Close();
                        writer.Dispose();
                    }

                    ForceUnlockIndex();
                }
                catch (Exception)
                {
                    throw;
                }
            }
        }