Problem statement

A shipping company requires a standardized method to track cargo across its supply chain. Define a contract for trackable items and implement it for a freight container.

Task requirements

• Define an ITrackable interface with a TrackingId string property and an UpdateLocation method.

• Create a FreightContainer class that implements the ITrackable interface.

• Ensure your implementation works with the provided Program.cs execution logic.

Constraints

• You must place all types in the Logistics file-scoped namespace.

• FreightContainer must initialize the TrackingId property to string.Empty to satisfy null-safety requirements.

• The UpdateLocation method must print exactly "Container {TrackingId} is now at: {newLocation}".

Good luck trying the exercise! If you’re unsure how to proceed, check the “Solution” tab above.

Get hints

• Use the interface keyword to define ITrackable.

• Interface members do not have access modifiers like public, as they are public by default.

• Use the colon : syntax in the class definition to implement the interface.