private void addButton_Click(object sender, EventArgs e)
        {
            AddPhotos addPhotos = new AddPhotos(this);

            this.Hide();
            addPhotos.Show();
        }
 //AddPhotos addPhotos;
 public PictureEvents(AddPhotos addPhotos)
 {
     InitializeComponent();
     this.username  = addPhotos.username;
     this.eventName = addPhotos.eventName;
 }