dotnetframework/System.Configuration.ConfigurationManagerv9.0.0

About

Provides types that support using XML configuration files (app.config). This package exists only to support migrating existing .NET Framework code that already uses System.Configuration. When writing new code, use another configuration system instead, such as Microsoft.Extensions.Configuration.

How to Use

The following example shows how to read and modify the application configuration settings.

using System; using System.Configuration; class Program { static void Main() { try { // Open current application configuration Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); KeyValueConfigurationCollection section = config.AppSettings.Settings; // Print settings from configuration file foreach (string key in section.AllKeys) { Console.WriteLine($"{key}: {section[key].Value}"); } // Add new setting section.Add("Database", "TestDatabase"); // Change existing setting section["Username"].Value = "TestUser"; // Save changes to file config.Save(ConfigurationSaveMode.Modified); ConfigurationManager.RefreshSection(config.AppSettings.SectionInformation.Name); } catch (ConfigurationErrorsException ex) { Console.WriteLine("Error reading configuration: "); Console.WriteLine(ex.Message); } } }

To run this example, include an app.config file with the following content in your project:

<?xml version="1.0" encoding="utf-8" ?> <configuration> <appSettings> <add key="Server" value="example.com"/> <add key="Username" value="Admin"/> </appSettings> </configuration>

Main Types

The main types provided by this library are:

• System.Configuration.Configuration
• System.Configuration.ConfigurationManager

Additional Documentation