They are not attributes they are elements
myXmlTextWriter2.WriteStartElement("Account");
myXmlTextWriter2.WriteAttributeString("nr", AccountNumber.ToString());
myXmlTextWriter2.WriteAttributeString("name", Name);
double summ=0;
foreach (AccountRecord ar in kp)
{
myXmlTextWriter2.WriteStartElement("Accounting");
myXmlTextWriter2.WriteElementString("income", ar.Amount.ToString());
myXmlTextWriter2.WriteEndElement();
summ += ar.Amount;
}
myXmlTextWriter2.WriteElementString("summincome", summ.ToString());
myXmlTextWriter2.WriteEndElement();