What is two tier architecture and three tier architecture?

Question

Two tier architecture and three tier architecture Simple understand Real world example.

Answer 1

sir 

add the namespace in your form at the top

using System.Xml; 

 

load your xmlfile like below code 

public void addlist()
       {
       XmlDocument xdoc = new XmlDocument();
       xdoc.LoadXml("XmlName.xml");

       }

from xdoc you can retrive the node and add in the list