i have created c# asp.net website i want to host trough free web hosting site

We can't really give you a list of free sites, because you are better off looking at Google, and finding some that give support in your native language, and provide the features you need - .NET version, database support (type and size), etc. Then look for reviews of them by locals and make a decision.

However, I will say this: free hosts are worth slightly less than you pay for them. Generally speaking performance is low, availability is patchy, and reliability is poor. Paying (even for a fairly cheap hosting service) generally provides a much, much better service to you, and your users / customers.

When you have selected your host, the easiest way is probably just to use the Visual Studio Publish feature to load your site onto the hosting service.