System.Data.DataSet objSet = new DataSet();

System.Data.DataTable objTable = new DataTable("test");

objTable.Columns.Add("CodeID", typeof(string));

objTable.Columns.Add("FilterCitem ", typeof(string));

objTable.Columns.Add("FilterSqlStr", typeof(string)); 

System.Data.DataRow dr = objTable.NewRow();

dr[] = "row0andcol0";

dr[] = "row2andcol2";

dr[] = "row3andcol3";

objTable.Rows.Add(dr);

objSet.Tables.Add(objTable);