public string GetHeaderText()
{
var be = HeaderTextBlock.GetBindingExpression(TextBlock.TextProperty);
be?.UpdateTarget();
return(HeaderTextBlock.Text);
}
public ShowList()
{
InitializeComponent();
HeaderTextBlock.SetBinding(TextBlock.TextProperty, new Binding("HeaderText")
{
Source = this
});
ItemsSource = new ObservableCollection <string>();
ItemsSource.CollectionChanged += ItemsSource_CollectionChanged;
}