JuniorTheoryCommon

What does the program print?

var taxi = new Taxi();

class Vehicle { public Vehicle() => Console.Write("V"); }
class Car : Vehicle { public Car() => Console.Write("C"); }
class Taxi : Car { public Taxi() => Console.Write("T"); }

VCT

Expecting TCV: the object is a Taxi, but each constructor first calls its base one, so Vehicle prints first and Taxi last.
Expecting only T or a compile error: with no : base(…) written, C# calls the base class's parameterless constructor on its own.

What changes if Vehicle has only the constructor Vehicle(string name)?
How would Taxi pass an argument to a constructor of Car?

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JuniorTheoryCommon

What does the program print?

var taxi = new Taxi();

class Vehicle { public Vehicle() => Console.Write("V"); }
class Car : Vehicle { public Car() => Console.Write("C"); }
class Taxi : Car { public Taxi() => Console.Write("T"); }

VCT

Expecting TCV: the object is a Taxi, but each constructor first calls its base one, so Vehicle prints first and Taxi last.
Expecting only T or a compile error: with no : base(…) written, C# calls the base class's parameterless constructor on its own.

What changes if Vehicle has only the constructor Vehicle(string name)?
How would Taxi pass an argument to a constructor of Car?

Back to questions Open topic in roadmap →Answer it yourself — Quiz