When you compile your executable, this does not merge the Telerik class libraries with it. Therefore you still need a reference to them. Hence, when you try running your application on another computer, the needed assemblies either should be in the same directory where the executable is or they should be in the GAC of that particular computer.
The preferred way for application deployment is using the ClickOnce
technology. Fore more information about this approach, please refer to our Knowledge Base article: Deploying RadControls for WinForms applications using ClickOnce technology.
If you have additional questions, feel free to contact me.
All the best,
the Telerik team