How to search a particular field in lucene.net

1. You are opening 2 table tags here.
2. variable index will always be 1. Not sure why do you have it.

Will something like this help you (not tested at all):

html.Append("<table style=\"border-style:solid\">");
           int fieldCount = reader.FieldCount;

           html.Append("<thead>");
           for (int index = 0; index < fieldCount; index++)
           {
               html.Append("<th>" + reader.GetName(index) + "</th>");
           }

           html.Append("</thead><tbody>");

           while (reader.Read())
           {
               html.Append("<tr>");

               for (int index = 0; index < fieldCount; index++)
               {
                   html.Append("<td>" + reader[index].ToString() + "</td>");
               }
html.Append("</tr>");
           }
           html.Append("</tbody></table>");