public SymbolControl(ControlTemplate template)
 {
     Template = template;
     _dataContext = new SymbolControlContext();
     DataContext = _dataContext;
     HorizontalContentAlignment = HorizontalAlignment.Center;
 }
 public SymbolControl(ControlTemplate template)
 {
     Template     = template;
     _dataContext = new SymbolControlContext();
     DataContext  = _dataContext;
     HorizontalContentAlignment = HorizontalAlignment.Center;
 }