How we use class in asp.net (c#)

[vkdixit]

Hi,
Actually i want to create a connection class after that i want use it in .aspx page.


my code is:
conn.cs page:


class conn
{
public void connect()
{
public string str;
str = "initial catelog=xx;data sourse=yy;uid=aa;pwd=aa";
}
}



default.aspx page:


using system,data.sqlclient;

sqlconnection con;
sqlcommand cmd;


page_load()
{
conn obj=new conn(); //create instance...

?
?
?
}