Which dll has 'BusyIndicator' for silverlight?

I have installed Nov '09 silverlight 3 toolkit. Referenced System.Windows.Control from C:\Program Files\Microsoft SDKs\Silverlight\v3.0 Libraries\Clie开发者_Go百科nt\System.Windows.Controls.dll

but when I compile my code I am getting "Error 6 The type or namespace name 'BusyIndicator' does not exist in the namespace 'System.Windows.Controls' (are you missing an assembly reference?)"

I opened the dll in object browser and I could not find the busyindicator either. Could some one please tell me which dll has the Busy Indicator?

I found the following link regarding the same issue but did not say which dll has this class.

Thanks,

It's the System.Windows.Controls.Toolkit assembly.

Direkt link to the source code.

Generally, I'd strongly recommend to switch to 4.0 though.