C#

SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.Filter = "xml files (*.xml)|*.xml|All files (*.*)|*.*";
saveFileDialog1.FilterIndex = 2;
saveFileDialog1.RestoreDirectory = true;

if (saveFileDialog1.ShowDialog() == DialogResult.OK) {
    XmlTextWriter w = new XmlTextWriter(saveFileDialog1.FileName, Encoding.UTF8);
    w.WriteStartDocument(true);
    // use w to write your XML
    w.WriteEndDocument();
    w.Flush();
    w.Close();
}

Luc Pattyn wrote:

IMO there is no need for that, every Close has an implicit Flush in it.

foreach (SomeType theItem in someList) {
   DoSomethingWith(theItem);
}

//this is inside the loop of the datagrid view...
SeatEntity gridSeat = (SeatEntity)gridView[ColumnIndex, RowIndex].Value;
//We did a few things here, we indexed into the gridView using the column and the row, this returns a DataGridViewCell.
//We then used the .Value property to get what is stored inside.  Since this returns an object, we cast it to the type that we stored in the grid (I'm assuming you're storing SeatEntitys).

//now we can loop through the list and compare the values
foreach(SeatEntity seat in seatList){
    if(seat.SeatId == gridSeat.SeatId){
         //do something
    }
}