sqldatareader in a thread

Question

I'm having a wierd issue where i run a query in a thread and the while(Connection.read()) duplicates my results. Anyone else have this issue? For isntance if I have TestTable with the following values: TestID 1 2 3 It will console.writeline 1 1 2 2 3 3 Below is sample code: private void button3_Click(object sender, System.EventArgs e) { ThreadStart DBThread = new ThreadStart(StartDBDelegate) ; Thread DB = new Thread(DBThread) ; DB.Start(); } public void StartDBDelegate)() { Invoke(new UpdateLoadTableDelegate(RunUpdateNow)); } public void RunUpdateNow() { string source = "server=testserver;uid=testuid;pwd=testpassword;database=TestDB"; string selectconn1 = "SELECT TestID as dbTestID FROM TestTable" SqlConnection conn1 = new SqlConnection(source); conn1.Open(); SqlCommand executeconn1 = new SqlCommand(selectconn1,conn1); SqlDataReader Connection1 = executeconn1.ExecuteReader(); while(Connection1.Read()) { Console.WriteLine (Connection1[0].ToString()) } } I can reduce this menace by doing the following to the while loop, although I shouldnt have to do this...this is really bugging me. It doesnt do this outside of the thread. string strTestID = ""; while(Connection1.Read()) { if(strTestID != Connection1[0].ToString())) { Console.WriteLine (Connection1[0].ToString()) strTestID = Connection1[0].ToString()); } }