Can't change a button't text at runtime anymore??????

[C# Programming]

Hi

When I could change the text at runtime, I think the property was called Capture.
How do you do in Visual Studio 2010?
If I set the button btn's property Text to "By" and try the below
btn.Text="Hi" nothing happens.
How do I do it nowadays http://www.barakasoft.com/script/Forums/Images/smiley_confused.gif

Many Thanks
Fia