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Trying to create a Dependency Injection/IoC Container FROM SCRATCH

Nick Chapsas

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  • A classic. People kept recommending it from 2021 to 2024.
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Advanced. Deep dive for people who know the field.

51K views6 years ago3 recommendations

Software designProgramming languagesDesign patternsC# and .NET

Nick Chapsas demonstrates how to build a custom dependency injection and inversion of control container from scratch using C#.

Become a Patreon and get source code access: patreon.com/nickchapsas Check out my courses: dometrain.com Hello everybody I'm Nick and in this video I will try to create a dependency injection or DI container from scratch. This is also known as an IoC container or an inversion of control container. I'm going to do that using C# and .NET Core 3. In object-oriented design, the dependency inversion principle is a specific form of decoupling software modules. When following this principle, the conventional dependency relationships established from high-level, policy-setting modules to low-level, dependency modules are reversed, thus rendering high-level modules independent of the low-level module implementation details. Don't forget to comment, like and subscribe :) Social Media: Follow me on GitHub: bit.ly/ChapsasGitHub Follow me on Twitter: bit.ly/ChapsasTwitter Connect on LinkedIn: bit.ly/ChapsasLinkedIn

Why it's here

3 people recommend this

What people say. Recommended as an educational exercise to understand how dependency injection containers work under the hood.

u/syutzyin r/dotnet • Recommends

On “Implementing DI container”

If what you mean is "how to use the built-in DI container in .NET core", you might start here: https://learn.microsoft.com/en-us/dotnet/core/extensions/dependency-injection If what you mean is "I want to write my own container from scratch" (which is probably not a good idea for production, but could be a fun learning exercise), you might start here: [video (Nick Chapsas video)
14View on Reddit

u/stuartseupaulin r/dotnet • Recommends

On “How to understand the fundamentals better?”

For something like dependency injection, look up a video on how to code a version of it from scratch. I haven't watched this video myself but it looks decent enough. link to this video For middleware, I think the docs should be sufficient. https://learn.microsoft.com/en-us/aspnet/core/fundamentals/middleware/?view=aspnetcore-9.0
3View on Reddit

u/AussieBoy17in r/dotnet • Recommends

On “Scouped Services, creating newly on every request without pool?”

…how it is implemented without actually seeing the source code. It's been a while since I have watched this video, but this guy does some really good videos and this is a video of him going through making his own DI container. Note, the .Net DI container is going to be a lot more complicated with things like caching, but the concept is the same. [video >I've never seen Lifetime concept from them Here's my best attempt to explain the differences. **Host** In .Net, our DI providers are inside a 'host'. I think of this almost like a mini program inside your program. It's meant to be pretty much isolated in its own little bubble. The Host creates the root Service Provider which is what is…
2View on Reddit