internal void Update(string themeKey)
{
if (ThemeDictionaries.TryGetValue(themeKey, out ResourceDictionary themeDictionary))
{
MergedDictionaries.InsertOrReplace(ContainsApplicationThemeDictionary ? 1 : 0, themeDictionary);
}
else
{
if (ContainsApplicationThemeDictionary)
{
Debug.Assert(MergedDictionaries.Count >= 1 && MergedDictionaries.Count <= 2);
if (MergedDictionaries.Count == 2)
{
MergedDictionaries.RemoveAt(1);
}
}
else
{
MergedDictionaries.Clear();
}
}
}
