how to populate a combobox based on the previous combobox selection in XML

[dolphinradar]

This question is related to my previous question where I got answer to use LINQ which I cant understand. Is there any other way to do this without using LINQ? (I know LINQ is best, but not good to start with by beginners i think)I want to populate a combobox based on the previous combobox selection (\[code\]cbProduct\[/code\] and \[code\]cbBrandName\[/code\])Both comboboxes have values from same XML file.Before asking here I have gone through many links but there answer is mostly based on LINQ or it is not related to xml.I tried the below code: (it just assigns values)\[code\] DataSet dsBill = new DataSet(); dsBill.ReadXml(@"..\..\stock.xml"); /*ERROR*/ cbProduct.DataSource = dsBill.Tables[0].DefaultView.ToTable(true, "productname"); cbProduct.DisplayMember = "productname";\[/code\]One more question, this code was working when i have not assigned \[code\]name\[/code\] attribute to xml file and now it is showing Error -- "Column 'productname' does not belong to underlying table 'items'."Please help
Thanks in Advance.