Yes.  If you are debugging via Visual Studio.NET, just go to Immediate window.

The data value may not be changed.  Note: The variable value may be changed, but the original immutable data value was discarded and a new data value was created in memory.

It is available to any sub-class (a class inheriting this class).

Prevents relocation of a variable by GC.

A property is not classified as a variable - it can't be ref or out parameter.

The tuple-oriented calculus uses a tuple variables i.e., variable whose only permitted values are tuples of that relation. E.g. QUEL

The domain-oriented calculus has domain variables i.e., variables that range over the underlying domains instead of over relation. E.g. ILL, DEDUCE.