public void Handle(ISession session)
{
ChatSession chatSession = session as ChatSession;
ChatUser user = chatSession.Owner;
user.ChatThemeSettings.BackgroundId = Theme.BackgroundId;
user.ChatThemeSettings.BackgroundBlur = Theme.BackgroundBlur;
user.ChatThemeSettings.BackgroundColor = Theme.BackgroundColor;
user.ChatThemeSettings.Use = Theme.Use;
user.ChatThemeSettings.IconColor = Theme.IconColor;
user.SaveChatTheme();
user.Send(this, chatSession);
}