シャドーイング練習: Creator of C# and TypeScript: "AI will NEVER Replace Coders, Here's Why" | Anders Hejlsberg - 動画で英語スピーキングを学ぶ

Will AI replace software engineers?

I am highly skeptical.

Who's going to make the AI?

AI is not going to innovate.

Someone has to design the CPU, the operating system.

AI is not going to do that.

What are your opinions on vibe coding?

That doesn't really bring a lot to the table anyway.

That code has to come from somewhere.

It's not all going to be generated by AI.

When people are learning to code, what are some common mistakes you see people make?

Not spending enough time.

How this industry makes progress.

What was the story of you creating C Sharp?

Well the story probably starts like with my Today I'm sitting down with Anders Halsberg, a technical fellow at Microsoft, to talk about the future of coding and AI.

If you're in computer science or are a tech beginner, you need to pay attention.

Because Anders is not just a tech leader, but he is the literal creator of programming languages C sharp and TypeScript.

And so when he talks about AI and coding, he is speaking from decades worth of experience.

And he dispels a lot of the lies and nonsense people have been spewing about AI.

Plus, if you want to succeed and actually get ahead of most developers, he shares some crazy behind-the-scenes stories from building C Sharp and TypeScript,

and I am confident that will change the way you think about coding projects going into the future.

So a lot of value to unpack in this video, and let's get to it right away.

In the world of AI that we live in today, a lot of people are even questioning, is it worth learning how to code?

Oh, I absolutely think it's worth learning how to code.

Programming languages and code is how AI expresses itself.

And there's a whole different world from AI below

that has to exist that AI assumes the existence of in the code that it generates.

That code has to come from somewhere.

It's not all going to be generated by AI.

What are your opinions on Vibe coding is going to replace coders?

I am highly skeptical.

For a lot of stuff that is rote, how many times can you write this to-do list app?

AI in its training set has seen it a gazillion times, so it can riff over that.

And it can actually get more and more creative now.

But when it comes down to business logic or you've got to invent something, that's how this industry makes progress, right?

That's not going to come from AI.

True, true.

Like understanding the fundamentals.

Yesterday, I got the opportunity to have a quick chat with Satya.

I had asked him beginner level skills people need to know when they're getting into tech.

He mentioned understanding the architecture.

That's something AI can help you generate the code, but it won't do the fundamental design, which comes from the human mind.

And you designed languages such as C-sharp and TypeScript, and were very cognizant what problems you were trying to solve.

Rewinding the clock a little bit, what was the story of you creating C Sharp?

Well, the story probably starts like with my previous endeavor there at a company called Borland, where I wrote Turbo Pascal and then worked also as the architect of a product called Delphi.

This was all about making programmers more productive, rapid application development, and we competed with Microsoft's marquee product, Visual Basic.

Right.

And, you know, if you can't beat them, join them.

So I joined Microsoft in 96.

There was this thing called Visual Basic that was super easy to write apps in.

And then there was this thing called C++ that is where all the expressiveness and performance was available.

And people really wanted a little bit of both.

And so we set out to create that sort of best of both worlds, the best of both worlds, you know, something that gave you the power and expressiveness of C++,

but with the ease of use of Visual Basic.

With a bunch of modern infrastructure behind it, called .NET.

Are there any examples of features of the language that did both so you could explain to us?

Things like properties and events.

There were object-oriented programming languages already, but everyone was working with this notion of properties on their objects and events on their objects.

But no programming languages had given first-class treatment to them before.

Do you have any example of a great project to create with C-sharp?

Any kind of web backend or REST API or write a game.

I mean, like Unity, right?

Like a third of the world's C-sharp programmers write games.

It almost doesn't matter what you write.

Once you start writing code, you start understanding how programming languages work and how to build data structures and how to get performance, how to measure performance.

When you're learning, it's less important exactly what you write, but just the fact that you're writing.

You could go write a framework or set a collection classes if you wanted to, it doesn't matter.

Yeah, and did you think that C Sharp would be as big as it got to today?

No, of course not.

You never know, right?

I mean, and yes, C Sharp, I am very proud that it stood the test of time.

In fact, I was talking to someone earlier today

that it's 25 years since we released C Sharp at the 2000 Professional Developers Conference.

So 25 years, that's a long time for something to still be around and in widespread use.

Fast forwarding a little into your journey.

So TypeScript, right?

Can you give us the story of that and what problem you were trying to solve?

Really quick, as a software engineer, you would think writing code is what slows me down.

But it's actually the small tasks that pile up the most.

That's when I started using Superhuman Mail, which manages my inbox and keeps me organized without all the back and forth.

And now I can connect it to tools like ChatGPT or Claude and actually manage my inbox from there.

Let your AI agents run your inbox and calendar.

Let me show you how I use this.

I connected Superhuman Mail to Claude, and now I can run everything from here.

One thing I use a lot is cross-tool workflows.

For example, I can ask it to look through recent emails and summarize anything important, then send that straight into Slack.

Or after meetings, I can have a draft of follow-ups based on my notes without opening my inbox.

It removes a lot of the small tasks that usually add up.

If you're afraid of your email sounding too AI-generated, you can insert rules just using no em dashes

or ellipses to ensure you're all good to go and that it is in your tone of voice.

The beauty is these rules will apply every time without having to edit each time to match your voice and tone.

The biggest game changer for me was the AI to help me actually prepare for the day.

It can collect all the tasks and insights that I have and help me create a to-do list.

Set it up once and stay in control all year.

Make sure to sign up for the business plan if you want to connect CLAW, ChatGPT, and other AI tools.

And now back to the video.

Well, Timescript, the story probably starts about 15 years ago when a team at Microsoft, the Outlook team, came to us, and I was doing C Sharp at the time,

and they came to us and they asked, hey, could you guys productize this thing called Script Sharp?

100

And I'm like, what's Script Sharp?

101

Well, it's this thing that takes C Sharp and cross compiles it to JavaScript.

102

Okay.

103

And I'm like, okay.

104

And why would someone want to do that?

105

Well, we do that because that's the only way that we can get great tooling and scalability for a large project.

106

And we're writing this enormous app in JavaScript because at the time,

107

everyone was moving to the browser and JavaScript as the true cross-platform solution.

108

You know, there was like a whole diversity of device form factors coming out like phones and tablets and the PC wasn't,

109

you couldn't just assume that it was going to run on a PC.

110

And so browser was it.

111

And HTML5 had happened and you could actually write decent UI, right?

112

And so people were just writing enormous apps in JavaScript and having a very hard time doing it.

113

And this team had chosen to solve the problem by writing the app in C Sharp and cross-compiling it to JavaScript.

114

And I'm like, but that's crazy.

115

Surely you're not going to write best of breed JavaScript apps by writing them in C Sharp.

116

Wouldn't you rather write them in JavaScript? what is it about JavaScript that's broken and can we fix it?

117

And so that was sort of the genesis of TypeScript, fixed JavaScript, if you will.

118

Make it usable for large scale projects and add those things to the language

119

that are necessary such that we can build great tooling on top.

120

And in particular, that meant adding a static type system to the language.

121

We then enable the ability to write great tool that you see in say, Visual Studio Code and our language.

122

So more like the developer experience exactly

123

because that's ultimately where the productivity comes from right it's like having things like statement completion

124

and code navigation and seeing red squigglies when you make a mistake

125

and whatever that's what developers love

126

that stuff yeah once you give it to them you can never take it away again yeah

127

so python developers might disagree slightly but well they might

128

but you know what i don't know that people are writing million line apps or programs in Python to the same extent.

129

Once something gets big enough, you really do need these things.

130

That readability in TypeScript.

131

Yeah.

132

As the creator of C-sharp and TypeScript, when people are learning to code, what are some common mistakes you see people make?

133

Not spending enough time learning the basic principles and really sort of understand what is it I'm doing?

134

What is a variable really?

135

And what is an array?

136

And what is a data structure?

137

And how do pointers work?

138

Once you grok

139

that, then it doesn't really matter what language you're in you

140

know that's just a veneer on top of the semantics right

141

but really understanding the semantics is super important because

142

that allows you to think in a more abstract fashion

143

if you don't get that deeper understanding of it then you're sort of thinking at

144

that veneer syntactic level of what do i have to write

145

but you're not really understanding why you're writing it interesting

146

if i'm a beginner in tech and i wanted to get hired at a big tech a company like Microsoft, what is your number one piece of advice?

147

Write a bunch of open source code, put it on GitHub, that becomes your resume.

148

There's nothing like demonstrating the ability to code.

149

And a fantastic way to demonstrate that is by building stuff and putting it out in the open.

150

Yeah.

151

So don't sit on it, share it.

152

Yeah.

153

And particularly with AI in the world that we live in, are there certain problems that you would choose to tackle?

154

It depends on what kind of programming excites you, because there are many different things you could do.

155

Some people like building apps, the UI aspect of it

156

and the experience of the app other people like systems like stuff

157

that doesn't have a ui at all or

158

but it's like they're into making it perform incredibly well

159

and you know that some people like the theory of it all right and

160

so there are many different ways you can dive into it

161

i mean for me i've always been fascinated with writing efficient data structures

162

and understanding how they work how does a hash table work?

163

Why does it work?

164

And how do I make it more efficient?

165

How can I structure the data in my program the right way?

166

Because ultimately, that's where the performance comes from.

167

Right, right.

168

Exactly.

169

Exactly.

170

It's like the small design choices that affect so much.

171

And do you think a computer science degree is worth it?

172

Oh, I definitely think so.

173

You know, I was sort of somewhat self-taught because at the time I went to college back in Denmark, I grew up in Denmark,

174

The engineering school I went to didn't even have computer science yet.

175

They started it the following year, right?

176

But I was like in the late 70s.

177

You could go to the other university for computer science, but I was doing engineering.

178

And so a lot of things I sort of had to learn by myself by doing.

179

Boy, I could have saved a lot of time by getting an education

180

that allows you to understand like the history of programming.

181

And like we've talked about here, like what is a programming language?

182

What are the principles of programming?

183

What is data structures?

184

What are databases?

185

What are operating systems? like all of this stuff it certainly

186

helps to have a passion for it you know for me i sometimes joke i never had a real job

187

because i was always doing my hobby coding was always my hobby right then i was fortunate yeah

188

if you aim to do your best work you there's got

189

to be a bit of passion in it you know right for sure

190

and one final question will ai replace software engineers no who's gonna make the AI, right?

191

And who's going to make the programming languages that the AI expresses itself in?

192

And who's going to write the frameworks that the AI talk?

193

I mean, no, AI is an accelerant and it's going to change the way that we do things.

194

And it's going to remove a lot of grunt work

195

that we don't need to do anymore because AI can help us do it, but it'll allow us to focus more on the creative side because AI is not going to innovate.

196

It's not going to like, Bing, have this crazy idea I had in the shower this morning, you know, AI doesn't work that way.

197

Right, right.

198

So right now, as a software engineer, we code five years from now when AI is more into the workflow.

199

More pervasive.

200

What do you see software engineers do?

201

AI will be able to do a lot of that grunt work.

202

But like I said, there's still the deeper side of the science.

203

These frameworks that you have to target, someone has to design the CPU, someone has to design the operating systems.

204

There's plenty left.

205

Someone has to get the right idea

206

and devise the right data structure for sharding this app so our startup can grow fast or what have you, right?

207

AI is not going to do that, but it's going to help you with these like, yeah, okay, the grunt work of writing a test for a pull request is fine.

208

That doesn't really bring a lot to the table anyway.

209

So yeah, hand that off.

210

Sweet.

211

Well, that's about all I have in this video.

212

I really hope that you guys enjoyed it.

213

And if you did, make sure to hit the like button and subscribe if you haven't already.

214

If you're interested in my absolutely free tech newsletter, link for that down below in the description.

215

And if you're interested in watching the conversation I had with the CEO of Microsoft, Satya Nadella, you might want to click right here.

📺 同じチャンネル

How I Would Learn Python FAST (if I could start over)

Business EnglishUniversity StudentsWorking Adults

Data Structures Explained for Beginners - How I Wish I was Taught

Business EnglishInterview EnglishUniversity Students

✨ おすすめ動画

81 文

このレッスンについて

このレッスンでは、プログラミング言語とAIの関係について学びます。特に、C#とTypeScriptのクリエイターであるアンダース・ヘイルスバーグの意見を通じて、AIがソフトウェアエンジニアを置き換えることができない理由や、プログラミングを学ぶことの重要性について考えます。受講者は、英語の発音を良くする方法や、shadowspeak（シャドースピーク）技法を使用した練習のヒントも得られます。

キーボキャブラリーとフレーズ

AI (人工知能) - 人間の知能を模倣する技術。
プログラミング言語 - ソフトウェアを作成するための言語。
イノベーション - 新しいアイデアや方法の創出。
ビジネスロジック - 企業が重要視する問題解決のための思考プロセス。
基礎理解 - 科学や技術の基本的な知識。
シャドースピーク - 聞いた内容を即座に繰り返す練習法。
開発者 - ソフトウェアやアプリケーションを作成する人。
競争 - 他者と成果を比較し、優位に立とうとすること。

練習のヒント

このビデオを活用する際には、以下のポイントを参考にして、英語スピーキング練習に取り組んでください。まず、アンダースが話すスピードに注意を払いながら、何度もシャドースピークを行うことが重要です。特に彼の強調する部分や感情のこもったトーンを意識して、声に出して繰り返してみましょう。ビデオの内容がやや早く感じられる場合は、一時停止を利用して、各フレーズの発音をじっくり学ぶことができるでしょう。

また、IELTS スピーキング対策として、実際に自分の意見を述べる練習をすることも役立ちます。アンダースが述べた意見を基に、自分の考えを英語で表現してみましょう。この方法は、英語の流暢さを向上させるだけでなく、自分の意見を明確に伝える力を養うことにもつながります。

この動画の文法

話し手がよく使っている文型を、動画の実際の表現とともに紹介します。

文型	動画での表現
現在完了形 have/has + 過去分詞 — 過去の出来事が今も関係している	has seen · i've always been fascinated · we've talked
受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる	be generated · been fascinated

シャドーイングとは？英語上達に効果的な理由

シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。

シャドーイングのやり方: ステップ別の完全ガイドを読む →

シャドーイング練習: Creator of C# and TypeScript: "AI will NEVER Replace Coders, Here's Why" | Anders Hejlsberg - 動画で英語スピーキングを学ぶ

How I Would Learn Python FAST (if I could start over)

Data Structures Explained for Beginners - How I Wish I was Taught

AI Coding Is a Dead End

Is AI About to Change Movies Forever?

Can This Vibe Coder Beat a Senior Developer?

How To Learn To Code In 2026

Advantages and Disadvantages of AI

Therapy for the Vibe-Coded Brain

How Sam Altman Actually Uses AI to Run OpenAI and His Life

Cloud Providers are changing RAPIDLY [REUPLOAD]

7 Programming myths that waste your time

Fastest way to become an AI Engineer in 2026

What is AI and ML? [Pt 2] | Generative AI with .NET for Beginners

Anthropic just proved AI isn't getting better

このレッスンについて

キーボキャブラリーとフレーズ

練習のヒント

この動画の文法

シャドーイングとは？英語上達に効果的な理由