Programatically Modifying and Saving AppSetting value in Root Level Web.Config using ASP.NET C#

In this blog we are going to see, How to Modify the AppSettings value and Save it..

In this blog we are going to see, How to Modify the AppSettings value and Save it.

 Root Level Web.Config

  <appSettings>
    <add key="AppKey" value="AppValue"/>
  </appSettings>

Code Snippet

using System;
using System.Configuration;
using System.Web.Configuration;

namespace SampleApplication.WebConfig
{
    public partial class webConfigFile : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)

        {
            //Helps to open the Root level web.config file.
            Configuration webConfigApp = WebConfigurationManager.OpenWebConfiguration("~");

            //Modifying the AppKey from AppValue to AppValue1
            webConfigApp.AppSettings.Settings["AppKey"].Value = "AppValue1";

            //Save the Modified settings of AppSettings.
            webConfigApp.Save();
        }
    }
}

Output of Root Level Web.Config:

 <appSettings>
    <add key="AppKey" value="AppValue1"/>
  </appSettings>