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private static Lucene.Net.Documents.Document EntryToDocument(IndexEntry e, bool createSummaryField)
        {
            string value = string.Empty;
            IndexEntryFieldInfo info = null;
            Lucene.Net.Documents.Document ret = new Lucene.Net.Documents.Document();
            string summaryFieldName = IndexEntry.GetSystemFieldName(IndexEntrySystemField.Summary);
            System.Collections.Generic.Dictionary<string, string> allFields = new System.Collections.Generic.Dictionary<string, string>(e.Fields);

            if (createSummaryField && !allFields.ContainsKey(summaryFieldName))
                allFields.Add(summaryFieldName, e.Summary);

            foreach (string name in allFields.Keys)
            {
                if (!string.IsNullOrEmpty(allFields[name]))
                {
                    value = allFields[name];
                    info = e.InitializeField(name, value);

                    if (info != null)
                    {
                        ret.Add(new Lucene.Net.Documents.Field(info.Name, info.Value,
                            (info.Store ? Lucene.Net.Documents.Field.Store.YES : Lucene.Net.Documents.Field.Store.NO),
                            (info.Tokenize ? Lucene.Net.Documents.Field.Index.ANALYZED : Lucene.Net.Documents.Field.Index.NOT_ANALYZED),
                            (info.UseTermVector ? Lucene.Net.Documents.Field.TermVector.YES : Lucene.Net.Documents.Field.TermVector.NO)));
                    }
                }
            }

            return ret;
        }