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How to access App.config file setting using C#

by Narain Siddharth   on May 08, 2011   Category: C#   |  Views: 1943    |  Points: 25   |  Silver 

See the below sample App.config file

<?xml version="1.0" encoding="utf-8" ?>
<add key="connection" value="Data Source=Server_Name;Initial Catalog= Database_Name;UserId=Username;Password=Password"/>

Code snippet for accessing connection string from App.config file

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Configuration;
using System.Windows.Forms;

namespace WindowsFormsApplication1
public partial class Form1 : Form
public Form1()

private void button1_Click(object sender, EventArgs e)
string conn = ConfigurationSettings.AppSettings["connection"];


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