void _fieldLocation_CheckedChanged(object sender, EventArgs e)
{
var fl = new FieldLocationChangedEventArgs();
fl.FieldLocation = FieldLocation;
OnFieldLocationChanged(fl);
}
protected virtual void OnFieldLocationChanged(FieldLocationChangedEventArgs e)
{
EventHandler<FieldLocationChangedEventArgs> handler = FieldLocationChanged;
if (handler != null)
{
handler(this, e);
}
}