Dim fs As New FileStream("D:/file.txt, FileMode.OpenOrCreate)
Dim sw As StreamWriter = New StreamWriter(fs)
sw.WriteLine("记录")
sw.Close()

发现如果是英文和数字就显示正常，但中文就会出现类似繁体字的乱码，怎么回事？
而且有时候会正常，有时候又不正常

这是中文编码问题.

实例化类StreamWriter的时候，可以选择编码

In IO operation can be encoded choice, generally GB2312, such as the code: System.Text.Encoding.GetEncoding ( "GB2312")

super man