/// <summary>
/// Saves changes to <see cref="Out"/> to the
/// given IConfigurationSource.
/// </summary>
/// <param name="source">Source to use as the primary source.</param>
public void SaveChanges(IConfigurationSource <T> source)
{
var @base = CreateBaseConfig();
var mrg = new T();
mrg.MergeWith(_primarySource.Config);
mrg.MergeWith(Out, defaultObject: @base);
// Copy over the values for all "always serialized" properties
foreach (var prop in _propertiesAlwaysSerialized
.Select(propName => typeof(T).GetProperty(propName)))
{
prop.SetValue(mrg, prop.GetValue(Out, null), null);
}
source.PartialSave(mrg,
GetProperties(@base, _primarySource.Config, PropertyStatus.Changed)
.Select(p => p.Name)
.Concat(_propertiesAlwaysSerialized)
.Except(_propertiesNeverSerialized));
}