AppSettings Property
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ConfigurationManager.AppSettings Property

Note: This property is new in the .NET Framework version 2.0.

Gets the AppSettingsSection data for the current application's default configuration.

Namespace: System.Configuration
Assembly: System.Configuration (in system.configuration.dll)

public static NameValueCollection AppSettings { get; 
/** @property */
public static NameValueCollection get_AppSettings ()

public static function get AppSettings () : NameValueCollection

Property Value

Returns a NameValueCollection object containing the contents of the AppSettingsSection object for the current application's default configuration.

Exception typeCondition


Could not retrieve a NameValueCollection object with the application settings data.

A AppSettingsSection object contains the contents of the configuration file's appSettings section.

The following code example shows how to get a named application setting using the AppSettings property.

// Get appSettings.
static void GetAppSettings()
    // Get the appSettings.
    NameValueCollection appSettings =
    // Get the collection enumerator.
    IEnumerator appSettingsEnum =

    // Loop through the collection and
    // display the appSettings key, value pairs.
    int i = 0;
    Console.WriteLine("App settings.");
    while (appSettingsEnum.MoveNext())
        string key = appSettings.Keys[i];
        Console.WriteLine("Name: {0 Value: {1",
        key, appSettings[key]);
        i += 1;

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0

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