Question

I want to save ListViewColumns’ widths to xml file.How to do ?

Answer 1

First off you can retrieve the column count like so:

int columnCount = listView.Columns.Count;

If you wish to iterate over the columns you can do the following:

foreach (ColumnHeader column in listView.Columns)
{
    //Use the column.Width Property to get the width and save it to XML.
}

Look into using the XmlDocument class or Linq to XML, to persist and load your XML data.

XmlDocument Class

LINQ to XML

LINQ to XML – 5 Minute Overview