SphereCast and all related pages are confusing.
The easiest way for me to describe Spherecasts in the shortest terms possible is to post my bug report:
I find that on the occasion that I need to report a bug in Unity (which for me is usually reporting documentation issues), it can be annoying to see two identical icons when swapping between applications using keystrokes (<cmd> + <tab>).
By default, both Unity and the Unity Bug Reporter share the same icon! o.O?
SO – I made a new icon for the Bug Reporter.
This is a link to a page on the M2H Game Studios‘ site that converts UnityScript/Unity.js to C# converter:
This is very convenient site.