Telerik RadRotator can be configured to shows random items by setting its EnableRandomOrder="true" property. If this property is set to true then, the third item can be shown first, for example. This does not change the item's index, however, and if the first item is clicked (and it is actually the third one in the rotator's item collection) its index will be 2 (the indexes start from 0)
In this example, RadRotator shows the content of a directory. The images are loaded using the GetFilesInFolder method, shown in the codebehind file.