<%@ page language="c#" autoeventwireup="true" debug="true" %><script language="c#" runat="server">void page_load(object sender,eventargs e){ if (!ispostback){  hashtable htb=new hashtable();  htb.add("1234","microsoft");  htb.add("3210","sum");  downlist_2.datasource=htb;  downlist_2.datavaluefield="key";  downlist_2.datatextfield="value";  downlist_2.databind();  } else{  label_1.text="downlist_1 value is:"+d...