Type test and type conversion in C#

Specialization, Extension, and Inheritance - slide 33 : 40

It is possible to test if the dynamic type of variable v is class type C

There are two ways to convert (cast) one class type to another

v is C
- True if the variable v is of dynamic type C
- Also true if the variable v is of dynamic type D, where D is a subtype of C

(C)v
- Convert the static type of v to C in the given expression
- Only possible if the dynamic type of v is C , or a subtype of C
- If not, an InvalidCastException is thrown
v as C
- Non-fatal variant of (C)v
- Thus, convert the static type of v to C in the given expression
- Returns null if the dynamic type of v is not C, or a subtype of C

The typeof operator can be applied on a typename to obtain the corresponding object of class Type

The Object.GetType instance method returns an object of class Type that represents the run-time type of the receiver.