private static object ForceText(DependencyObject sender, object value)
{
if (!NumericTextBox.AreAllValidNumericChars((IEnumerable <char>)(string) value))
{
throw new ArgumentException();
}
else
{
return(value);
}
}
protected override void OnPreviewTextInput(TextCompositionEventArgs e)
{
e.Handled = !NumericTextBox.AreAllValidNumericChars((IEnumerable <char>)e.Text);
base.OnPreviewTextInput(e);
}