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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
namespace System.Configuration
{
/// <summary>
/// This interface is an extension to SettingsProvider that a provider can implement
/// to support additional functionality for settings classes that derive from ApplicationSettingsBase.
/// </summary>
public interface IApplicationSettingsProvider
{
/// <summary>
/// Retrieves the previous value of a given SettingsProperty. This is used in conjunction with Upgrade.
/// </summary>
SettingsPropertyValue GetPreviousVersion(SettingsContext context, SettingsProperty property);
/// <summary>
/// Resets all settings to their "default" values.
/// </summary>
void Reset(SettingsContext context);
/// <summary>
/// Indicates to the provider that the app has been upgraded. This is a chance for the provider to upgrade
/// its stored settings as appropriate.
/// </summary>
void Upgrade(SettingsContext context, SettingsPropertyCollection properties);
}
}
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