Thanks for contacting us and for reporting this issue.
I would like to inform you that we are aware of this issue and are working on addressing it. It seems that there are certain changes in the .NET Framework 4.0 which cause this behavior, i.e. if you change the target framework of your project to be .NET Framework 3.5 or earlier, you will not get this behavior.
I hope that we will be able to get this fixed as soon as possible and will make sure to get back to you with further details on the case.
I hope this is helpful.
Thanks for the understanding and do not hesitate to write back anytime you have further questions or need assistance.
the Telerik team
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