БД на sqlExpress, подключение в vs.
конфигурационный файл<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<connectionStrings>
<add name="DefaultConnection" connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=Proxy;Integrated Security=True"
providerName="System.Data.SqlClient"/>
</connectionStrings>
</configuration>
C#string connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;
Console.WriteLine(connectionString);
Почему исключение
ConfigurationManager.ConnectionStrings["ConnectionName"].ConnectionString возвращает null?
