Init-only setters in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an init-only property named Name.

C Sharp (C#)

public string Name { get; [1]; }

Drag options to blanks, or click blank then click option'

Aprivate set

Binit

Cset

Dreadonly

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'set' allows changing the property anytime, not just during initialization.

Using 'readonly' is not valid for properties.

The init accessor allows setting the property only during object initialization.

2fill in blank

medium

Complete the code to create a record with an init-only property Age.

C Sharp (C#)

public record Person { public int Age { get; [1]; } }

Drag options to blanks, or click blank then click option'

Ainit

Bset

Cprivate set

Dreadonly

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'set' allows changing the property after creation.

Using 'private set' restricts setting even during initialization.

Records often use init to make properties immutable after creation.

3fill in blank

hard

Fix the error in the property declaration to make it init-only.

C Sharp (C#)

public string Title { get; [1]; }

Drag options to blanks, or click blank then click option'

Aset

Breadonly

Cprivate set

Dinit

Attempts:

3 left

💡 Hint

Common Mistakes

Leaving 'set' allows modification anytime.

Using 'readonly' is invalid for properties.

Changing set to init makes the property settable only during initialization.

4fill in blank

hard

Fill both blanks to define an init-only property with a private getter.

C Sharp (C#)

public string Description { [1] get; [2] }

Drag options to blanks, or click blank then click option'

Aprivate

Binit

Cpublic

Dset

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'set' instead of 'init' allows modification after initialization.

Making getter public when it should be private.

The property has a private getter and an init-only setter.

5fill in blank

hard

Fill all three blanks to create a record with an init-only property and a constructor.

C Sharp (C#)

public record Book [1] { public string Author { get; [2]; } = [3]; }

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A()

Binit

C"Unknown"

Dset

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'set' instead of 'init' allows property changes after creation.

Omitting the constructor parentheses.

Not providing a default value.

The record has a parameterless constructor, an init-only property, and a default value.