Visual Studio .NET - how to create a dll file for sql insert update delete and make use it in web project

I am doing web project in which i've to insert update and delete and select.. i don want to write the operations in code behind.. i just want to create a c# class library for insert update and delete and build it and make use that dll file as a refrence in web project.. In web project it shd be dynamic like i shd just pass the parameters like database name and tablename and values.. all these should be automatically fetched and operation like insert update select should be performed by dll file... so please help me regarding this

Hope this helps

http://dbconnectionlibrary.codeplex.com/

Another one

http://www.databasedev.co.uk/data-access-layer.html

Thanks Danasegarane Arunachalam 
Please just give me any asp.net example how to get the library refrence and running can be found using that library