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WebConfigurationManager.AppSettings Property

Gets the Web site's application settings.

Namespace:  System.Web.Configuration
Assembly:  System.Web (in System.Web.dll)

public static NameValueCollection AppSettings { get; }

Property Value

Type: System.Collections.Specialized.NameValueCollection
A NameValueCollection object that contains the AppSettingsSection object for the current Web application's default configuration.


A valid NameValueCollection object could not be retrieved with the application settings data.

An AppSettingsSection object contains the configuration file's <appSettings> section.

The following example shows how to access configuration information with the AppSettings method.

        // Show the use of the AppSettings property
        // to get the application settings. 
        static void GetAppSettings()

            // Get the appSettings key,value pairs collection.
            NameValueCollection appSettings =
                as NameValueCollection;

            // Get the collection enumerator.
            IEnumerator appSettingsEnum =

            // Loop through the collection and 
            // display the appSettings key, value pairs.
            int i = 0;
            Console.WriteLine("[Display appSettings]");
            while (appSettingsEnum.MoveNext())
                string key = appSettings.AllKeys[i].ToString();
                Console.WriteLine("Key: {0} Value: {1}",
                key, appSettings[key]);
                i += 1;


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.