private void ImageBox_Load(object sender, EventArgs e)
{
var modes = Enum.GetValues(typeof(PictureBoxSizeMode));
var currentMode = pictureBox.SizeMode;
this.centeredToolStripMenuItem.ComboBox.BindingContext = this.BindingContext;
this.centeredToolStripMenuItem.ComboBox.DataSource = modes;
this.centeredToolStripMenuItem.ComboBox.SelectedItem = currentMode;
}