The world of .NET development offers powerful collections like List, Dictionary, HashSet, and many other, but knowing when to use each can make or break your app’s performance. This session will walk you through the ins and outs of .NET collections, diving into their use cases, internal mechanics, and performance tips—empowering you to write efficient, scalable code with confidence.

00:00 | Introduction

01:01 | Overview of SSW Rewards App

01:32 | Anton’s Experience and .NET History

03:08 | Comparing Algorithms: Random Access Machine vs. Asymptotic Analysis

04:45 | Big O Notation Explained

06:18 | Common Algorithm Complexities: Constant, Linear, Quadratic

07:06 | Identifying Algorithm Complexity in Code

08:07 | Binary Search and Logarithmic Complexity

09:38 | Understanding .NET Collection Interfaces

11:43 | Arrays in .NET: Memory and Performance

13:41 | Performance Benchmarking: Row vs. Column Iteration in Arrays

17:16 | Multi-Dimensional Arrays and Memory Limitations

20:51 | Understanding Array Indexing in .NET

23:05 | Lists in .NET and Capacity Management

26:18 | Performance Impact of Capacity in Lists

28:57 | Array and List Performance: Key Takeaways

31:29 | Introduction to Queues in .NET

33:53 | Dictionary Internals: Hashing and Collisions

37:18 | Adding Elements and Handling Collisions in Dictionaries

44:00 | Advanced Topics: Concurrent Collections (Teased for Next Talk)

45:03 | Q&A Session and Conclusion



Links:
Need help?: https://ssw.com.au/ssw/Consulting

Follow us:
LinkedIn:   / ssw  
Twitter:   / ssw_tv  
Facebook:   / ssw.page  
Instagram:   / ssw_tv  
Tiktok:   / ssw_tv  

Get in touch:
Anton Polkonov – SSW Senior Software Engineer II
About: https://www.ssw.com.au/people/anton-polkanov/
LinkedIn: https://www.linkedin.com/in/anton-polkanov-504437128/

For more information about SSW’s consulting services, please visit https://ssw.com.au

#dotnet #dotnetcollections #algorithms #programming #netdevelopment #performance #bigonotation #ssw #sswrewards


V2 – Marcus

About the speakers

About the speakers

Anton Polkonov

Anton is a results-driven Senior Software Engineer at SSW with over 7 years of experience in professional software development. He has a proven track record of delivering high-quality solutions that meet the needs of both end-users and the business. Anton's expertise lies in designing and building robust software applications using cutting-edge approaches and techniques.

Anton is passionate about mobile development, specializing in the .NET platform and performance engineering. He stays updated on the latest advancements in technology to ensure he delivers solutions that are at the forefront of innovation. Additionally, Anton actively contributes to the tech community as the organizer of a competitive programming club in Newcastle.

Certified in Azure and proficient in .NET, Anton is well-equipped to tackle complex challenges and drive success in software development projects.

Related videos

Related videos

Do you explain why you’ve deleted or updated an appointment? | Adam Cogan | SSW Rules

Ever wonder why a meeting was moved or cancelled? Adam Cogan explains the “Secret Ingredient” to professional scheduling: always include a version history and reason for change at the top of your appointments. Improve clarity, keep a record of changes, and hold participants accountable with this simple SSW Rule.

Chat first before changing others’ code | Adam Cogan

Changing someone else’s code? Don’t just dive in! Adam explains why it’s important to check the source history and talk to the original developer before making changes. A quick chat can save headaches and keep everyone on the same page. Perfect advice for devs working in teams!

SSW TimePro – Create a new tenant | Jeoffrey Fischer

Learn how to provision a new tenant in TimePro and sync it with an external Dynamics 365 CRM system.

How to Report Bugs in Seconds | Brady Stroud

Tired of tedious bug reporting? Watch how Brady uses YakShaver.ai to turn a quick screen recording into a professional PBI instantly.

White space – Tips for recording demo | Adam Cogan

Awkward pauses can ruin an otherwise good presentation. In this video, Adam shares a simple tip to handle white space during demos and recordings. By telling your audience what’s about to happen, you avoid silence, cut out useless fillers, and sound more confident. Perfect for product demos, meetings, or presentations on any stage.

Don’t throw things over the fence until you’ve done what you can | Adam Cogan

“Throwing it over the fence” means passing your work or problem to others. This short video delivers one clear message: before you hand something off, do what you can yourself. It’s a simple reminder about responsibility, effort, and ownership in work, teamwork, and daily life.

Why No One Can Agree on the “New” Button? | Adam Cogan

Struggling to juggle a hotfix while mid-feature without losing your flow?

SSW Strasbourg Office in Europe | Walkthrough with Jean

Hear from SSW Senior Software Engineer Jake Bayliss about the importance of providing context, showcasing your work and asking for questions & direction from Product Owners.

Liking Github issues when they are read | Adam Cogan

“Throwing it over the fence” means passing your work or problem to others. This short video delivers one clear message: before you hand something off, do what you can yourself. It’s a simple reminder about responsibility, effort, and ownership in work, teamwork, and daily life.

How to supercharge a company with AI | Ulysses Maclaren

Explore how AI is transforming businesses right now! In this video, Ulysses Maclaren from SSW walks us through the innovative ways AI is being used at Tina CMS. From automating customer interactions to analyzing vast amounts of data and even managing sales leads, AI is revolutionizing workflows