I built a dll in C# with windows application. by using web application i need to download the dll into client machine.

Can any one help me in this regard by giving the approach.

Thanks in advance 

You cannot force a download from a web application, otherwise life would be very easy for virus programmers. You can write something into your Windows programme to download the dll using FTP or HTTP.  For more help, ask your question at windowsclient.net.

You have following options:-

1- Share dll on FTP server and download it from there

2- Make a web service which returns dll and access that service to retrive dll.

there might be other options as well

Hi madhavichandu 
 
I agree with Mike , you can also try to use Smart Client application to achieve this, please check the following links to get more information:
 
Integration of Smart Client applications with existing Web applications
http://www.codeproject.com/KB/smart/SmartDemo.aspx
 
Integration of Smart Client applications with existing Web applications
http://www.codeproject.com/KB/smart/SmartDemo.aspx
 
Building Smart Client using .NET
http://www.codeproject.com/KB/dotnet/DotNetBuildSmClnts.aspx

If you have more questions, I would like to suggest you post the questions on the windows client forum: http://windowsclient.net/Forums/
 
Thanks.