public BrowseFolderEvent(AbstractOptionPanel panel, string target, string description)
 {
     this.panel = panel;
     this.description = description;
     this.target = target;
 }
 public BrowseButtonEvent(AbstractOptionPanel panel, string target, string filter)
 {
     this.panel = panel;
     this.filter = filter;
     this.target = target;
 }