public override bool SaveToLocal(string key, string value)
{
ApplicationDataCompositeValue composite =
ApplicationData.Current.LocalSettings.Values[COMPOSITE_SETTING] as ApplicationDataCompositeValue ??
new ApplicationDataCompositeValue();
if (composite.Any(p => p.Key == key))
{
composite.Remove(key);
}
composite.Add(key, value);
ApplicationData.Current.LocalSettings.Values[COMPOSITE_SETTING] = composite;
return(true);
}