Hai,I am trying to connection using web.confing in connectionstring element
and i have written below code in connectionstring element in

<connectionStrings>
      <add name="DB1" connectionString="Data Source=DEV5\\SQLEXPRESS;Initial Catalog=icondatabase;Integrated Security=True" />
      </connectionStrings>

And in the .aspx.cs file (in Load_page)i have written below code

string connection= ConfigurationManager.ConnectionStrings["DB1"].ToString();
      SqlConnection cn = new SqlConnection("connection");

while i compiled page it give the error:
"
ArgumentExeption was Unhandled by User Code
Format of the initialization string does not conform to specification starting at index 0."

any body plz help me......

Remove double quotes.

...
 SqlConnection cn = new SqlConnection(connection);

Remove double quotes.

...
 SqlConnection cn = new SqlConnection(connection);

thanks it run....successfully.