c# – 如果要处理SqlDataReader,我是否需要调用close()？

查找下面显示的用户的简单示例.

using (var connection = new SqlConnection(Settings.GetValue("SqlConnection")))
  {
    SqlCommand command = new SqlCommand("select * from Users where Id = @Id",connection);        
    command.Parameters.Add("@Id",SqlDbType.UniqueIdentifier);
    command.Parameters["@Id"].Value = id;

    using (SqlDataReader reader = command.ExecuteReaderWithRetry())
    {
      reader.Read();

      if (reader.HasRows)
      {
        //Do work
      }

      //Is this neccesary?
      reader.Close();
    }
  }