为什么在VB2010中报错 ''System.data.oledb.oledbdatareader.friend sub new''？

错误 1 “System.Data.OleDb.OleDbDataReader.Friend Sub New(connection As System.Data.OleDb.OleDbConnection, command As System.Data.OleDb.OleDbCommand, depth As Integer, commandBehavior As System.Data.CommandBehavior)”是“Friend”，因此它在此上下文中不可访问。 E:\Items of Vs 2010\Student Information check System\Student Information Check\Student Information Check\Loading.vb 13 13 Student Information Check