The Switch component with Bootstrap skin looks odd. It is almost invisible in off state, and lacks a border around it when in on state.

This can be observed in the live demos site: https://demos.telerik.com/aspnet-ajax/switch/overview/defaultcs.aspx?skin=Bootstrap 

Error Creating Panel: Property accessor 'Text' on object 'Telerik.Web.Design.RadCheckBoxDesignerActionList' threw the following exception: 'Unable to cast object of type "Telerik.Web.UI.RadSwitch" to type "Telerik.Web.UI.RadCheckBox".'