Hi,
use this code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace WindowsApplication3
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
var connectionString = ConfigurationManager.ConnectionStrings["WindowsApplication3.Properties.Settings.Database1ConnectionString"].ConnectionString;
MessageBox.Show(connectionString);
}
}
}
And change your app.config file to the following:
<configuration>
<connectionstrings>
<add name="WindowsApplication3.Properties.Settings.Database1ConnectionString">
connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient"/>
</add></connectionstrings>
</configuration>
I tested it and it works for me.