SettingsProvider.cs

using System.Configuration.Provider;

namespace System.Configuration
{
    public abstract class SettingsProvider : ProviderBase
    {
        public abstract string ApplicationName
        {
            get;
            set;
        }

        public abstract SettingsPropertyValueCollection GetPropertyValues(SettingsContext context, SettingsPropertyCollection collection);

        public abstract void SetPropertyValues(SettingsContext context, SettingsPropertyValueCollection collection);
    }
}