I want to route my internet traffic over all my available connections (like LAN and Data card(3G)), based on conditions like, if a website is blocked over LAN, that traffic goes through Data Card (or other available internet connection). My ultimate motive is to integrate this feature in my web browser which I have already built using C# and .Net framework. I have found that one can add a route by using the following cmd command - route add DestinationIP mask subnet InterfaceGatewayIP but I am stuck as to how should it be implemented using C#?