16.1 a) True. b) False.
strings are immutable; they cannot be modified after they’re created.
StringBuilder objects can be modified after they’re created. c) False.
EnsureCapacity simply ensures that the current capacity is at least the value specified in the method call. d) True. e) True. f) False.
StringBuilder should be used if the
string is to be modified. g) False.
ToUpper creates a new
string with all of its letters capitalized.
ArgumentOutOfRangeException. d) currency.