can any one send me small project to write separate class file to connect sql ? [Resolved]

Hi all

I am using visual studio 2008 and sql server 2005 .

Can any one send me simple web application or wpf browser application only.
In that ,i want to learn to write a separate class file for connecting database sql server 2005 ,instead writing
sql connection for each page .and also with sample data ,i need some code to connect database
to display records in datagrid and also do edit,insert and delete.

Hope you understand my query

thanks in advance

S.Naveen... [Resolved]