Asp.net + xml, درس مبسط

private void Page_Load(object sender, System.EventArgs e)
{
1: XmlTextReader reader=new XmlTextReader(Request.MapPath("guestBook.xml"));
2: while(reader.Read()){
3: Label1.Text+= reader.Value + "";} 
} 

//C#
Label1.Text+="text"; == Label1.Text=Label1.Text + "text";
// VB.NET
Label1.Text=Label1.Text + "text" الان نأتي لدورالكتابة للملف .. سأبدا أولا بكتابة الكود ثم أشرح ما هو مكتوب .. try { 1: XmlTextWriter writer=new XmlTextWriter(Request.MapPath("guestBook.xml")); 2: writer.Formatting=Formatting.Indented; 3: writer.WriteStartDocument(); 4: writer.WriteStartElement("name",""); 5: writer.WriteString(strName.Text); 6: writer.WriteEndElement(); 7: writer.WriteStartDocument(); 8: writer.WriteStartElement("body",""); 9: writer.WriteString(strBody.Text); 10: writer.WriteEndElement(); 11: writer.WriteStartDocument(); 12: writer.WriteStartElement("email",""); 13: writer.WriteString(strEmail.Text); 14: writer.WriteEndElement(); 15: writer.WriteEndDocument(); 16: writer.Close(); } catch { Response.Write(ex.Messege); }