Switch creates a dynamically determined branch condition to indicate the value of a specified expression.

Switch will call System.Object.ToString() on the object passed in via SwitchOn, and branch on that evaluated string.

A common use case for Switch is to branch on a value that is a discrete set of values. In this scenario, the developer building the script can create a branch per known value. If the value is an open-ended set of values, then Switch most likely is not appropriate, since branch conditions must be explicitly declared when building scripts.

null should never be passed into SwitchOn.