ADO.net (how To Close A Reader)

Hello, I'm trying to run the following snippet as Console app, and I get an error: "a reader is already open for this connection, and should be closed first" I tried to manually say: SqlDataReader.Close() in the begining of the code, but still get the error, Any suggecstions how to manually close the reader? thank you ---------- here's the code -----------using System; using System.Data; using System.Data.SqlClient; using System.Data.SqlTypes; namespace ADO.NET { /// <summary> /// Summary description for Class1. /// </summary> class Class1 { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main(string[] args) { SqlConnection cn = new SqlConnection ("SERVER=MyServer; INTEGRATED SECURITY=TRUE;" + "DATABASE=AdventureWorks"); SqlCommand cmd1 = new SqlCommand ("Select * from HumanResources.Department", cn); cmd1.CommandType = CommandType.Text; try { cn.Open(); SqlDataReader rdr = cmd1.ExecuteReader(); while (rdr.Read()) { if (rdr["Name"].ToString() == "Production") { SqlCommand cmd2 = new SqlCommand("SELECT * FROM " + "HumanResources.Employee WHERE DepartmentID = 7", cn); cmd2.CommandType = CommandType.Text; SqlDataReader rdr2 = cmd2.ExecuteReader(); while (rdr2.Read()) { } rdr2.Close(); } } rdr.Close(); } catch (Exception ex) { Console.WriteLine (ex.Message); } finally { cn.Close(); } } } }