问一个关于DataReader的问题

public static SqlDataReader GetReader(CommandType cmdType, string cmdText)
{
   SqlCommand cmd = new SqlCommand();
   SqlConnection conn = new SqlConnection(connectionString);
   PrepareCommand(cmd,conn,null,cmdType,cmdText,null);
   SqlDataReader reader = cmd.ExecuteReader();
   cmd.Parameters.Clear();
   //在这里关闭就行了吧
   return reader;
}