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Master Dependency Injection in C# with Asp.Net Core

Name: Master Dependency Injection in C# with Asp.Net Core
Rating: 5.0 (1 reviews)

Learn Dependency Injection in C# with Asp.Net Core using Best Practices

Created byNitish Kumar - Microsoft MVP

Last updated 2/2026

English

What you'll learn

Master Dependency Injection fundamentals and understand how IoC containers work in ASP.NET Core 10 applications
Implement and manage service lifetimes (Transient, Scoped, Singleton) to build efficient and scalable applications
Configure service lifetimes correctly to prevent memory leaks and optimize application performance
Register services using multiple methods and configure advanced DI patterns for real-world production scenarios
Write testable, loosely coupled code using best practices and avoid common DI pitfalls and anti-patterns
Implement constructor injection, property injection, and method injection patterns in real-world projects

Course content

11 sections • 48 lectures • 3h 55m total length

Introduction to course1:25
Meet with your Instructor0:56
System setup - SDK, Editor0:41
The Problem with 'new': Understanding Tight Coupling in ASP.NET Core6:39
Learn what dependencies are and why tight coupling is a problem in ASP. NET Core applications. This tutorial covers creating instances with the 'new' keyword and explains why this approach leads to unmaintainable code.
What You'll Learn:
What are dependencies in C# and ASP.NET Core
Creating object instances using the new keyword
Understanding tight coupling and its problems
Why tightly coupled code is hard to test and maintain
Real-world examples of tight coupling issues
Perfect for: ASP.NET Core developers, C# programmers, and anyone learning dependency injection fundamentals.

Keywords: ASP.NET Core, Dependency Injection, C#, Tight Coupling, Dependencies, . NET Core, Software Architecture, Design Patterns
Solving Tight Coupling with Dependency Injection - . NET Core Console App7:11
Solve tight coupling problems by implementing your first Dependency Injection in a .NET Console application. Learn how to use Microsoft.Extensions.DependencyInjection package to manage dependencies and write loosely coupled code.
What You'll Learn:
Introduction to Dependency Injection (DI) concept
How DI solves tight coupling problems from Video 1
Installing Microsoft.Extensions.DependencyInjection NuGet package
Setting up DI container in . NET Console applications
Registering services and resolving dependencies
Comparing tightly coupled vs loosely coupled code
Understanding the ServiceProvider in .NET Core
By the end of this video, you'll implement your first working dependency injection example and understand how DI transforms your code architecture.
What is Dependency Injection - A Demo using Asp.Net Core Web API6:42
Quiz: Recap

Constructor Injection in ASP. NET Core - The Recommended DI Pattern4:43
Learn Constructor Injection, the most widely used and recommended dependency injection pattern in ASP.NET Core. Discover how to inject dependencies through class constructors and why this is the preferred approach for required dependencies.

What is Constructor Injection in C# and ASP.NET Core
Implementing Constructor Injection in Controllers and Services
Why Constructor Injection is the recommended pattern
Handling multiple dependencies in constructors
Benefits: Immutability, testability, and explicit dependencies
Real-world examples in ASP.NET Core Web API
Property Injection in ASP.NET Core - Optional Dependencies3:23
Learn Property Injection for handling optional dependencies in ASP.NET Core. Understand how to inject dependencies through properties, the pros and cons of this approach, and why it's less commonly used than constructor injection.
What is Property Injection in C# and ASP.NET Core
Implementing Property Injection with attributes
When to use Property Injection for optional dependencies
Property Injection vs Constructor Injection comparison
Drawbacks: Mutability and implicit dependencies
Real-world use cases in ASP.NET Core applications
Method Injection with [FromServices] Attribute in ASP.NET Core4:24
Learn Method Injection and when to use it in ASP.NET Core applications. Understand how to inject dependencies directly into specific methods using the [FromServices] attribute and when this pattern is more appropriate than constructor injection.
What is Method Injection in ASP.NET Core
Using [FromServices] attribute for method-level DI
When to use Method Injection vs Constructor Injection
Injecting dependencies into action methods
Use cases: Optional dependencies and method-specific services
Real-world scenarios in ASP.NET Core Web API

Singleton Lifetime Explained - ASP. NET Core Dependency Injection15:08
What is dependency container
Details about the IServiceCollection
Working with multiple services
Demo: With GUID
Demo: With collection
Scoped Lifetime Explained - ASP.NET Core Dependency Injection8:00
Transient Service Lifetime in ASP.NET Core3:50
Registering Services Without Interface & Using Factory Delegates5:50
Learn how to register services without interfaces and use factory delegates in ASP. NET Core DI. Discover when to register concrete classes directly and how to use factory patterns for complex object creation scenarios.
ServiceDescriptor - Advanced Service Registration in ASP.NET Core10:32
Learn how to register services using ServiceDescriptor in ASP.NET Core. Understand the low-level API behind service registration and discover advanced scenarios where ServiceDescriptor provides more control than standard Add methods.

Creating Runtime Instances with ActivatorUtilities.CreateInstance Method8:48
Multiple Parameters & Dependency Resolution - ActivatorUtilities4:03
GetServiceOrCreateInstance - Fallback Pattern with ActivatorUtilities4:46
CreateFactory Method - Performance Optimization with ActivatorUtilities9:37
Issue with the CreateInstance method
Introduction to CreateFactory method
How to create instance using CreateFactory
Correct way to use the CreateFactory
How to pass one or more params using CreateFactory

Creating Child Scopes with IServiceProvider. CreateScope() Method7:22
IServiceScopeFactory - Creating Service Scopes in ASP.NET Core1:31
Injecting Transient Services into other Transients7:03
Injecting Scoped Services into Transients4:22
Injecting Singleton Services into Transients2:48
Injecting Scoped Services into other Scoped4:16
Injecting Transient Services into Scoped3:09
Using Transient Services in Scoped Services - Best Practices1:08
Injecting Singleton Services into Scoped1:45
Injecting Singleton Services into other Singleton1:50
Injecting Transient Services into Singleton6:06
Injecting Scoped Services into Singleton3:29

Requirements

Basic C# knowledge - if you understand classes and methods, you're ready to start!
Familiarity with ASP.NET Core basics - no advanced knowledge required, beginners are welcome!
No prior Dependency Injection experience needed - this course covers everything from scratch
.NET 10 SDK and an IDE (Visual Studio, VS Code, Rider etc) - all free and easy to set up

Description

Master Dependency Injection in C# with ASP.NET Core 10.

Are you tired of writing tightly coupled, hard-to-test code? Want to build professional,

scalable ASP.NET Core applications that follow industry best practices? This comprehensive

masterclass will take you from DI fundamentals to advanced patterns used in production

applications.

What You'll Master:

• Dependency Injection Fundamentals - Understand IoC (Inversion of Control) principles and

why DI is essential for modern . NET development

• Service Lifetimes - Master Transient, Scoped, and Singleton patterns and know exactly

when to use each one

• Built-in DI Container - Learn ASP.NET Core's powerful dependency injection container

inside and out

• Service Registration - Discover multiple ways to register services and configure complex

dependencies

• Advanced DI Patterns - Implement factory patterns, options pattern, keyed services, and

named registrations

• Real-World Applications - Build practical projects that demonstrate DI in action

• Testing & Maintainability - Write loosely coupled, testable code that's easy to maintain

and scale

• Best Practices & Anti-Patterns - Learn what to do (and what to avoid) from an experienced

developer

• . NET 10 Features - Leverage the latest DI capabilities in . NET 10 and ASP.NET Core 10

How This Course Works:

1. Learn the Concept - Clear explanations of what, why, and how

2. See It In Action - Live coding demonstrations

3. Build It Yourself - Hands-on exercises and projects

4. Apply Best Practices - Industry-standard patterns and techniques

No more confusion. No more copying code blindly. No more tightly coupled applications.

By the end of this course, you'll have the confidence and knowledge to implement Dependency

Injection like a professional . NET developer. You'll write code that's easier to test,

maintain, and scale - skills that will set you apart in your career.

Who this course is for:

.NET developers (junior to mid-level) ready to level up their architectural skills
Engineers who want to truly understand DI instead of just copying code from tutorials
Developers building Web APIs, Microservices, or Enterprise applications with ASP.NET Core
Programmers who struggle with tightly coupled code and want to write testable applications
Anyone preparing for technical interviews or aiming for senior developer positions
Self-taught developers looking to learn industry-standard patterns and best practices
Developers migrating to . NET 10 who want to leverage modern DI features effectively

Master Dependency Injection in C# with Asp.Net Core

What you'll learn

Explore related topics

Course content

Introduction6 lectures • 24min

Dependency Injection Types: Constructor, Method & Property Injection3 lectures • 13min

Mastering DI Container and Service Lifetimes in ASP.NET Core5 lectures • 43min

Keyed Dependency Injection - Managing Multiple Implementations5 lectures • 27min

Conditional Service Registration Using TryAdd in ASP.NET Core2 lectures • 7min

Manually Resolving Dependency Injection5 lectures • 24min

Advanced Service Registration & Configuration Patterns3 lectures • 15min

Working with Generic Services in Dependency Injection2 lectures • 11min

ActivatorUtilities - Manual Object Creation with DI4 lectures • 27min

Understanding Scopes and Service Lifetime Combinations12 lectures • 45min

Requirements

Description

Who this course is for: