Stringa di connessione Sql Server in un Web.config

<configSections>

...

<connectionStrings>

<add name="connstring" connectionString="packet size=4096;user id=xxx;data source=(local);persist security info=True;initial catalog=NOME_DATABASE;password=xxx;" providerName="System.Data.SqlClient"/>

connectionStrings>

...

configSections>

data source: istanza del DataBase

user id: utente DataBase

password: password DataBase

initial catalog: nome DataBase

Recupero stringa di connessione in WebApplication C#

using System.Configuration;

...

string _connectionString = ConfigurationManager.AppSettings["ConnstringGESTIONEFLUSSOlocal"];