Use While loop to read query result data from SqlDataReader : SqlDataReader « Database « C# / C Sharp

Use While loop to read query result data from SqlDataReader

using System;
using System.Data; 
using System.Data.SqlClient; 

   class DataLooper{
      static void Main(string[] args) {
         string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";

         string sql = @"select FirstName from Employee";

         SqlConnection conn = new SqlConnection(connString);

         try {
            SqlCommand cmd = new SqlCommand(sql, conn);
            SqlDataReader reader = cmd.ExecuteReader();
            while(reader.Read()) {
               Console.WriteLine("{0}", reader[0]);
         catch(Exception e)
            Console.WriteLine("Error Occurred: " + e);


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