Convert GB2312 to UTF-8

static void Main(string[] args) {
    string infile = args[0];
    string outfile = args[1];

    using (StreamReader sr = new StreamReader(infile, Encoding.GetEncoding(936))) {
        using (StreamWriter sw = new StreamWriter(outfile, false, Encoding.UTF8)) {
            sw.Write(sr.ReadToEnd());
            sw.Close();
        }
        sr.Close();
    }
}

Private Shared Sub Main(ByVal args() As String)
    Dim infile As String = args(0)
    Dim outfile As String = args(1)
    Dim sr As StreamReader = New StreamReader(infile, Encoding.GetEncoding(936))
    Dim sw As StreamWriter = New StreamWriter(outfile, false, Encoding.UTF8)
    sw.Write(sr.ReadToEnd)
    sw.Close
    sr.Close
End Sub