When i tried to build the source Telerik.winControls.RadChar (RadControlsWinforms_Q2_2008_source) i got the following errors:
'Telerik.Charting.IChartDesigner' is inaccessible due to its protection level
'Telerik.Charting.Design.Wizard.Wizard' is inaccessible due to its protection level
'Telerik.Charting.IChartDesigner' is inaccessible due to its protection level
So i have created own .snk file and replaced following public key
[assembly: InternalsVisibleTo("Telerik.WinControls.RadChart, PublicKey=002400000480000094000000060200000024000052534131000400000100010019cf862854e9af9f6e363cbaad5b1ea4d5438bfb289a23dbfc85db0d84b7364ea12f17acb131cc74b122c2d84e16c92d16617b133fb5eab8a68009f46a2e2fab972034a2447cf164628c45712dc594e28a7b38c90f99ebea841cfc81a618f502ed19e401123d46a80a1554d74db81afb85c2f1953ba124103da86f65533468a2")]
with new one.
Still the error persists.