private void OnSourceChanged()
{
var textBlock = AssociatedObject;
if (textBlock != null && Source != null)
{
if (StringFormat.HasValue())
{
var content = string.Format(StringFormat, Source);
textBlock.SetValue(TextBlock.TextProperty, content);
}
else
{
textBlock.SetValue(TextBlock.TextProperty, Source.ToString());
}
}
}
