EASYTUTORGUIDEC# • C# 14 on .NET 10 LTS

List, Dictionary, HashSet, Queue and Stack

C# Chapter 15 of 60. Beginner-to-advanced teaching with a code example for every topic.

5 topics5 code examples10 Q&A

15.1 List, Dictionary, HashSet, Queue and Stack Fundamentals 15.2 List, Dictionary, HashSet, Queue and Stack Syntax and Structure 15.3 List, Dictionary, HashSet, Queue and Stack Practical Example 15.4 List, Dictionary, HashSet, Queue and Stack Common Mistakes 15.5 List, Dictionary, HashSet, Queue and Stack Best Practices

15.1 List, Dictionary, HashSet, Queue and Stack Fundamentals

List, Dictionary, HashSet, Queue and Stack Fundamentals is part of List, Dictionary, HashSet, Queue and Stack. Learn what the construct does, the syntax it requires, how data moves through it, and the mistakes that can make the program incorrect or unsafe.

Why it matters

Use this feature when it makes the program clearer, safer, easier to maintain, or more efficient. Start with a small example before using it in a larger application.

Code example

// List, Dictionary, HashSet, Queue and Stack Fundamentals
var value = 42;
Console.WriteLine($"Value = {value}");

Step-by-step

Read the declarations and identify each value or object.
Follow execution from the first statement to the last.
Predict the output before running the example.
Run or compile it using the toolchain for this course.
Change one input and explain why the new result changes.

Expected result

The example should demonstrate List, Dictionary, HashSet, Queue and Stack Fundamentals with a small, inspectable result. For platform-dependent or advanced examples, focus on the API pattern and verify the exact environment requirements.

Common mistakes

Common mistakes include using the feature before understanding lifetime/scope, ignoring errors, assuming conversions are harmless, or writing code that works only for one happy-path input.

Practice

Rewrite the example with different data. Add one edge case, predict the result, then test it. Explain the feature in your own words without looking at the lesson.

15.2 List, Dictionary, HashSet, Queue and Stack Syntax and Structure

List, Dictionary, HashSet, Queue and Stack Syntax and Structure is part of List, Dictionary, HashSet, Queue and Stack. Learn what the construct does, the syntax it requires, how data moves through it, and the mistakes that can make the program incorrect or unsafe.

Why it matters

Use this feature when it makes the program clearer, safer, easier to maintain, or more efficient. Start with a small example before using it in a larger application.

Code example

// List, Dictionary, HashSet, Queue and Stack Syntax and Structure
var value = 42;
Console.WriteLine($"Value = {value}");

Step-by-step

Read the declarations and identify each value or object.
Follow execution from the first statement to the last.
Predict the output before running the example.
Run or compile it using the toolchain for this course.
Change one input and explain why the new result changes.

Expected result

The example should demonstrate List, Dictionary, HashSet, Queue and Stack Syntax and Structure with a small, inspectable result. For platform-dependent or advanced examples, focus on the API pattern and verify the exact environment requirements.

Common mistakes

Common mistakes include using the feature before understanding lifetime/scope, ignoring errors, assuming conversions are harmless, or writing code that works only for one happy-path input.

Practice

Rewrite the example with different data. Add one edge case, predict the result, then test it. Explain the feature in your own words without looking at the lesson.

15.3 List, Dictionary, HashSet, Queue and Stack Practical Example

List, Dictionary, HashSet, Queue and Stack Practical Example is part of List, Dictionary, HashSet, Queue and Stack. Learn what the construct does, the syntax it requires, how data moves through it, and the mistakes that can make the program incorrect or unsafe.

Why it matters

Use this feature when it makes the program clearer, safer, easier to maintain, or more efficient. Start with a small example before using it in a larger application.

Code example

// List, Dictionary, HashSet, Queue and Stack Practical Example
var value = 42;
Console.WriteLine($"Value = {value}");

Step-by-step

Read the declarations and identify each value or object.
Follow execution from the first statement to the last.
Predict the output before running the example.
Run or compile it using the toolchain for this course.
Change one input and explain why the new result changes.

Expected result

The example should demonstrate List, Dictionary, HashSet, Queue and Stack Practical Example with a small, inspectable result. For platform-dependent or advanced examples, focus on the API pattern and verify the exact environment requirements.

Common mistakes

Common mistakes include using the feature before understanding lifetime/scope, ignoring errors, assuming conversions are harmless, or writing code that works only for one happy-path input.

Practice

Rewrite the example with different data. Add one edge case, predict the result, then test it. Explain the feature in your own words without looking at the lesson.

15.4 List, Dictionary, HashSet, Queue and Stack Common Mistakes

List, Dictionary, HashSet, Queue and Stack Common Mistakes is part of List, Dictionary, HashSet, Queue and Stack. Learn what the construct does, the syntax it requires, how data moves through it, and the mistakes that can make the program incorrect or unsafe.

Why it matters

Use this feature when it makes the program clearer, safer, easier to maintain, or more efficient. Start with a small example before using it in a larger application.

Code example

// List, Dictionary, HashSet, Queue and Stack Common Mistakes
var value = 42;
Console.WriteLine($"Value = {value}");

Step-by-step

Read the declarations and identify each value or object.
Follow execution from the first statement to the last.
Predict the output before running the example.
Run or compile it using the toolchain for this course.
Change one input and explain why the new result changes.

Expected result

The example should demonstrate List, Dictionary, HashSet, Queue and Stack Common Mistakes with a small, inspectable result. For platform-dependent or advanced examples, focus on the API pattern and verify the exact environment requirements.

Common mistakes

Common mistakes include using the feature before understanding lifetime/scope, ignoring errors, assuming conversions are harmless, or writing code that works only for one happy-path input.

Practice

Rewrite the example with different data. Add one edge case, predict the result, then test it. Explain the feature in your own words without looking at the lesson.

15.5 List, Dictionary, HashSet, Queue and Stack Best Practices

List, Dictionary, HashSet, Queue and Stack Best Practices is part of List, Dictionary, HashSet, Queue and Stack. Learn what the construct does, the syntax it requires, how data moves through it, and the mistakes that can make the program incorrect or unsafe.

Why it matters

Use this feature when it makes the program clearer, safer, easier to maintain, or more efficient. Start with a small example before using it in a larger application.

Code example

// List, Dictionary, HashSet, Queue and Stack Best Practices
var value = 42;
Console.WriteLine($"Value = {value}");

Step-by-step

Read the declarations and identify each value or object.
Follow execution from the first statement to the last.
Predict the output before running the example.
Run or compile it using the toolchain for this course.
Change one input and explain why the new result changes.

Expected result

The example should demonstrate List, Dictionary, HashSet, Queue and Stack Best Practices with a small, inspectable result. For platform-dependent or advanced examples, focus on the API pattern and verify the exact environment requirements.

Common mistakes

Common mistakes include using the feature before understanding lifetime/scope, ignoring errors, assuming conversions are harmless, or writing code that works only for one happy-path input.

Practice

Rewrite the example with different data. Add one edge case, predict the result, then test it. Explain the feature in your own words without looking at the lesson.