Property patterns in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the object has a property Age equal to 30 using a property pattern.

C Sharp (C#)

if (person is { Age: [1] })
{
    Console.WriteLine("Age is 30");
}

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

A30

BAge

Cperson.Age

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Using the property name instead of the value.

Trying to access the property outside the pattern.

The property pattern matches the property Age with the value 30.

2fill in blank

medium

Complete the code to check if the object has a Name property equal to "Alice" using a property pattern.

C Sharp (C#)

if (person is { Name: [1] })
{
    Console.WriteLine("Name is Alice");
}

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

AName

B"Bob"

CAlice

D"Alice"

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around the string value.

Using the property name instead of the value.

The property pattern matches the Name property with the string value "Alice". Strings must be in quotes.

3fill in blank

hard

Fix the error in the property pattern to correctly check if the object has a property IsActive set to true.

C Sharp (C#)

if (user is { IsActive: [1] })
{
    Console.WriteLine("User is active");
}

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

Atrue

B"true"

CTrue

DisActive

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes around boolean values.

Capitalizing boolean values incorrectly.

The boolean value true is used without quotes and with lowercase t in C#.

4fill in blank

hard

Fill both blanks to check if the object has properties Age greater than 18 and Name equal to "John" using property patterns.

C Sharp (C#)

if (person is { Age: [1], Name: [2] })
{
    Console.WriteLine("Adult named John");
}

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

A> 18

B"John"

D< 18

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect comparison operators.

Not quoting string values.

The pattern checks if Age is greater than 18 and Name equals "John".

5fill in blank

hard

Fill all three blanks to create a property pattern that matches an object with Age less than 65, Name starting with 'A', and IsActive true.

C Sharp (C#)

if (employee is { Age: [1], Name: [2], IsActive: [3] })
{
    Console.WriteLine("Active employee with name starting with A and age under 65");
}

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

A< 65

Btrue

Cvar n when n.StartsWith("A")

D> 65

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect operators for age comparison.

Not using var and when for string pattern.

Misplacing boolean value syntax.

The pattern uses a relational pattern for Age, a property pattern with a when clause for Name, and matches IsActive to true.