Thank you for writing.
property doesn't accept numeric values but the Horizontal
options of the Orientation
enum. It is not a suitable approach to use the Children
collection for accessing some of the inner elements. You can directly set the RadButton.ButtonElement.TextOrientation
.radButton1.ButtonElement.TextOrientation = Orientation.Vertical;
I would recommend you to have a look at the following help article which will get you familiar with the internal structure of RadButton
I hope this information helps. Should you have further questions I would be glad to help.