Let me explain what our version number means. In your case you are using Telerik's UI for WPF Product Version 2015.1.0406.40 release version:
2015 year Q1 06th of April .
NET Framework - [year].[release number].[month|day].[.Net Framework version]
So you are using Telerik's UI for WPF Product Version 2015.1.0406.40 for .
Net Framework v4.0.
I would suggest to use the Upgrade wizard in order to set the required references for .
Net Framework v4.5. Additional information on the Upgrade wizard
could be found on the following article: LINK
Hope that this information is helpful. If you have any other question regarding Telerik controls, please don't hesitate to contact us again.
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