The C Trilogy: How Dennis Ritchie, Bjarne Stroustrup, and Anders Hejlsberg Built the Modern World 🏛️

Almost every piece of software running on Earth today traces back to three people trying to solve the exact same headache: how to write large, complex programs without accidentally corrupting memory.

If you booted up a laptop today, opened a browser, played a 3D game, or swiped a credit card, you're running code shaped by Dennis Ritchie, Bjarne Stroustrup, and Anders Hejlsberg.

Together, they created the most famous trilogy in programming history: C, C++, and C#.

Let’s look at why these three languages exist, the corporate lawsuits that shaped them, and why all three are still running modern infrastructure today.

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Act I: Dennis Ritchie’s Machine (C, 1972)

      [ Dennis Ritchie @ Bell Labs ]
                    │
                    ▼
         "Trust the programmer."
                    │
            ┌───────┴───────┐
            ▼               ▼
      Raw Pointers     Linux & Windows
      Zero Safety      Runs on everything

In the early 1970s at Bell Labs, writing an operating system meant writing raw Assembly.

If you wrote code for one machine and your lab brought in a new computer the following month, you had to rewrite nearly every line from scratch.

Dennis Ritchie wanted something practical: a language that read like structured code, but mapped directly to hardware registers.

So he built C.

The Rule: "Trust the Programmer"

C has one founding assumption: you know what you are doing.

If you tell C to take a block of memory and overwrite byte 4,000, it won't check if that buffer belongs to you. It won’t check if you're about to panic the kernel. It just executes the instruction.

#include <stdio.h>
#include <stdlib.h>

// Act I: Raw Power. You ask for memory, you clean it up.
int main() {
    int count = 3;

    // Grabbing raw bytes from RAM
    int *scores = (int *)malloc(count * sizeof(int));
    if (scores == NULL) return 1;

    scores[0] = 95;
    scores[1] = 88;
    scores[2] = 100;

    for (int i = 0; i < count; i++) {
        printf("Score %d: %d\n", i + 1, scores[i]);
    }

    // Forget this line? That RAM is leaked until the process exits.
    free(scores);
    return 0;
}

The Win & The Pain

Because C compiles almost 1-to-1 to CPU instructions, it became the foundation of modern computing. The Linux kernel, Windows, macOS, Git, PostgreSQL, and Python's C runtime all sit on top of C.

• The Win: Pure execution speed. Zero runtime bloat. Runs on virtually any processor ever manufactured.
• The Pain: Forget to free your memory? Memory leak. Read one byte past the array? Segmentation fault.

---

Act II: Bjarne Stroustrup’s Titan (C++, 1985)

        [ Bjarne Stroustrup @ Bell Labs ]
                       │
                       ▼
    "You don't pay for what you don't use."
                       │
            ┌──────────┴──────────┐
            ▼                     ▼
       Classes & RAII        Unreal Engine
     Zero-Cost Abstractions  AAA Games & Browsers

By the mid-80s, software had outgrown C.

Writing a distributed simulation, a network switcher, or a graphical desktop application in procedural C meant managing thousands of disconnected structs and function pointers. Codebases were getting too large for loose pointers.

Bjarne Stroustrup (also at Bell Labs) liked the object-oriented structure of Simula, but needed the speed of C.

He didn't want to choose between abstraction and raw speed, so he built C with Classes, which became C++.

The Rule: "Zero-Cost Abstractions"

Stroustrup stuck to a strict design principle:

"What you don't use, you don't pay for. And further: What you do use, you couldn't hand code any better."

C++ introduced classes, inheritance, operator overloading, and templates. Critically, it avoided adding a background runtime or garbage collector.

Instead, C++ introduced RAII (Resource Acquisition Is Initialization). The idea is straightforward: objects own their resources, and when an object leaves its scope { }, its destructor fires and cleans up the memory instantly.

#include <iostream>
#include <vector>

// Act II: Zero-Cost RAII.
// No malloc. No free. No manual pointer bookkeeping.
int main() {
    // std::vector allocates its internal buffer on the heap automatically
    std::vector<int> scores = {95, 88, 100};

    for (size_t i = 0; i < scores.size(); ++i) {
        std::cout << "Score " << (i + 1) << ": " << scores[i] << "\n";
    }

    // No free() needed. 
    // When 'scores' leaves this closing brace, its destructor cleans up the memory.
    return 0;
}

The Win & The Pain

C++ became the industry standard wherever every millisecond counts: AAA game engines (Unreal Engine), browser rendering engines (Chromium, WebKit), high-frequency financial trading, and aerospace software.

• The Win: High-level object-oriented patterns with bare-metal C performance.
• The Pain: The language is enormous. Between templates, multiple inheritance, and move semantics, compiler error messages can look like an ancient spellbook.

---

Act III: Anders Hejlsberg’s Renaissance (C#, 2000)

        [ Anders Hejlsberg @ Microsoft ]
                       │
                       ▼
      "Make the developer happy and safe."
                       │
            ┌──────────┴──────────┐
            ▼                     ▼
      Managed Runtime (CLR)  Modern .NET & Cloud
      Garbage Collection     Span<T> & High Perf

By the late 90s, Microsoft had a Java problem.

Microsoft had been distributing their own modified implementation called Visual J++, adding Windows-specific hooks. Sun Microsystems sued them for breach of contract.

Following the lawsuit, Microsoft settled, walked away from Java, and decided to build their own language from scratch.

They tapped Anders Hejlsberg—the compiler engineer behind Turbo Pascal and Delphi—to lead "Project COOL" (C-like Object Oriented Language).

In 2000, that project launched as C#.

The Rule: "Developer Productivity & Safety"

Anders focused on cutting down developer friction: let the runtime handle memory bookkeeping so engineers can focus on shipping features.

C# paired a clean C-style syntax with the CLR (Common Language Runtime) and an automated Garbage Collector (GC). Memory is allocated on demand, and unused objects are swept up in the background.

With modern C# top-level statements, the classic class Program and static void Main ceremony is gone:

// Act III: Pure Productivity (Modern C# Top-Level Statements)
// No boilerplate class wrappers. Just write code.

var scores = new List<int> { 95, 88, 100 };

for (int i = 0; i < scores.Count; i++)
{
    Console.WriteLine($"Score {i + 1}: {scores[i]}");
}

// Zero memory bookkeeping. The Garbage Collector handles cleanup.

Dropping the Guardrails When Speed Matters

Plenty of devs still write off C# as a slow enterprise language, mostly because they haven't looked under the hood lately. When you actually need raw speed, modern C# lets you drop the guardrails:

1. The unsafe Keyword: Need direct pointer arithmetic? You can drop into an unsafe block and manipulate memory addresses directly like you're writing C.
2. Span<T> and Memory<T>: Modern C# lets you slice arrays, strings, and native memory buffers without allocating a single byte on the heap.

That combination is a big reason modern .NET regularly trades blows with Go and Rust on high-throughput TechEmpower web benchmarks.

The Win & The Pain

Between modern open-source .NET and the ubiquity of the Unity Game Engine, C# has evolved into one of the most practical general-purpose languages around.

• The Win: Fast to write, memory-safe by default, and backed by a modern cross-platform runtime.
• The Pain: Small runtime memory footprint, JIT compilation warm-up on cold starts, and occasional GC latency if you allocate millions of temporary objects carelessly.

The Quick Comparison

Here is how the three stack up side-by-side:

Feature	C (1972)	C++ (1985)	C# (2000)
Creator	Dennis Ritchie	Bjarne Stroustrup	Anders Hejlsberg
Memory	Manual (malloc/free)	Automatic via RAII (std::vector, smart pointers)	Managed by Garbage Collector (+ Span<T> & unsafe pointers)
Safety	Low (easy to crash)	High if using modern RAII (disastrous if not)	Very High (memory-safe by default)
Speed	🚀 Pure hardware speed	🚀 Pure hardware speed	⚡ Very fast (Modern .NET is heavily optimized)
Best For	Operating systems, drivers, tiny chips	Game engines (Unreal), browsers, trading	Web APIs, enterprise cloud, Unity games

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Why They’re All Still Running the World

People have been forecasting the demise of the C family for decades:

• "Rust will replace C and C++."
• "Go will replace C#."
• "Python will replace everything."

And yet, in 2026:

• C still runs the kernels of 3 billion Android phones and the vast majority of cloud hypervisors.
• C++ powers Unreal Engine 5, NVIDIA's compute stacks, and local LLM runtimes (llama.cpp).
• C# powers millions of commercial web backends and remains the default engine for indie game development via Unity.

Dennis Ritchie gave us the iron.

Bjarne Stroustrup gave us the abstractions.

Anders Hejlsberg gave us the developer ergonomics.

Fifty years on, they aren't even competing anymore—each one just claimed a different layer of the stack.

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Over to You:

If you had to build a brand new project tomorrow and could only pick one of these three, which one are you grabbing: C, C++, or C#?

Drop your pick in the comments below! 👇

Comments

[Dhruv Jani The DEVengers]

💬 Let's make this interesting!

What I find fascinating about this trilogy is that C, C++, and C# didn't simply replace one another. Each made a different trade-off between control, performance, safety, and developer productivity.

But here's a question:

If you were starting a completely new project today, would you choose C for maximum control, C++ for zero-cost abstractions, or C# for developer productivity?

And more importantly, what would make you choose one over the other?

I'd love to hear some real-world reasoning, not just language preferences! 🚀

(Also: this is my first post under DEVengers, hope it resonates with you all!)

[FrancisTRᴅᴇᴠ The DEVengers]

This is awesome Dhruv! First DEVenger post!

A good reminder of C, C# and C++. New information for me surprisingly, so it's good to see the history behind it.

I think it's also leave noting about the security aspects of it such as various attacks if you didn't write "correctly". For example, the most common is overflow attack if you written "C" in an un-optimized way.

Otherwise, a good introduction! Good work :)

[Dhruv Jani The DEVengers]

That's the thing with C that Denis Ritchhie trusted devs that they'll do their job properly!😂

[Peter Vivo]

One of my experiment is back to the C vibeing instead of rust

[Dhruv Jani The DEVengers]

Sir, we'd like to hear more about your experiment!

[Peter Vivo]

Will be soon around Nov 25. A vim like linux markdown first CLI editor.

[Dhruv Jani The DEVengers]

Looking forward to it Sir!
Have A Great Day!

[Alex Shev]

The lineage is a useful reminder that languages carry trade-offs forward, not just syntax. It would be interesting to map one recurring boundary—memory ownership, abstraction cost, or interoperability—across all three ecosystems. That makes the historical connection actionable for someone choosing where safety or control should live in a new system.

[Dhruv Jani The DEVengers]

Sure Sir, that'd make it more helpful and interesting but I wrote this with my knowledge as a student!😅

[Nnamdi Felix Ibe]

Interesting read, and a nice framing. I’ll answer your question from a slightly odd seat, though, because I don’t write any of the three. I run things written in them.

From that side, the decision isn’t about memory safety at all. It’s about what the build produces. A C or C++ binary drops into a scratch or distroless image with almost nothing around it, so the only patch surface is my own code. A C# service ships a runtime, and that runtime is its own patch surface, its own cold start and its own memory floor before my application has done a thing.

So my pick would be C#, for the reason your post doesn’t quite reach: I’d rather carry the runtime and take the productivity, because the operational cost of a runtime is predictable and the cost of a memory bug in production isn’t.

[Yug Vasava]

This is great, I know how we started from C in 1st year to C# in 3rd year. But still since I'm using java for competitive programming I got used to it and never returned to C family!

[Dhruv Jani The DEVengers]

Cool, nothing wrong in it! I've always seen C# completing all needs that Java has and Cpp didn't. And somehow you know I got my 1st internship and some months later a job in .NET. So, I'm used to this family!😄

[Yug Vasava]

Also, bro good for you joining DEVengers!

[Dhruv Jani The DEVengers]

Thanks bro!

[𝐓𝐡𝐞 𝐋𝐚𝐳𝐲 𝐆𝐢𝐫𝐥]

Pretty cool! Reminds me of my college days :) Currently using C++ for game dev!

[Dhruv Jani The DEVengers]

Great Di, Actually as I said earlier game dev sounds very tempting to me but I went through some tutorials on codecademy and realized its not for me😅.

But hats off to you! I'd love to try out your work!😄

[Maame Afua A. P. Fordjour]

Really enjoyed this, Dhruv. I don’t code in C, C++ or C#, so I never knew the history behind them until today. I didn’t know C# came about because Microsoft walked away from Java after the Sun lawsuit, or that C++ started as “C with Classes” at the same Bell Labs where C was made. Such an educative post, thanks for sharing!

[Vinmay Nair]

Great read! I think Ken Thompson and Unix deserve a mention here too. Rewriting Unix in C was a huge step in making operating systems portable. Maurice J. Bach's The Design of the UNIX Operating System is also worth mentioning. It goes pretty deep into System V and shows how many of those early design ideas around processes, memory and file systems are still relevant today.

[OneLifeVibe]

The framing of each language as a different trade-off rather than a ranking is what makes this work. If I had to pick one for a brand-new project tomorrow, I would take C#: the managed runtime and garbage collector remove the whole class of memory bugs that C leaves on the developer, and for most web or app work that safety is worth more than the raw control C offers. The RAII section was the clearest explanation of why C++ still earns its place in game engines and browsers, though — that part alone made the history worth reading.