public SentFileModel(int id, UserModel sender, UserModel receiver, string url)
{
this.Id = id;
this.Sender = sender;
this.Receiver = receiver;
this.Url = url;
}
public MessageModel(int id, UserModel sender, string content, DateTime time)
{
this.Id = id;
this.Sender = sender;
this.Content = content;
this.Time = time;
}
