Step 4： Iterators and IEnumerable in C#

Presented by: Serajoddin Aliabadi
In this video, we dive deep into how `IEnumerable` and iterators actually work in C#, going way beyond just “you can use it in a `foreach`”.

Using VS Code and SharpLab, I’ll show you:
- How to create iterator methods with `IEnumerableT` and `yield return`
- What really happens behind the scenes when you iterate over a collection
- How the C# compiler generates a state machine for your iterator methods
- What an enumerator does (`GetEnumerator`, `MoveNext`, `Current`) and how it all fits together

We’ll start from a simple example and gradually peel back the layers using SharpLab to inspect the generated code. By the end, you’ll not only know how to write iterator methods, but you’ll also understand what the compiler is doing for you under the hood.

If you’ve ever wondered:
- “What magic lets `foreach` work?”
- “What does `yield return` actually do?”
- “What is this ‘state machine’ people talk about in C#?”

…this video is for you.

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🔧 Tools used in this video:
- VS Code
- SharpLab
#csharp #dotnet #IEnumerable #yieldreturn #iterators #SharpLab #vscode #csharpinternals

Видео Step 4： Iterators and IEnumerable in C# канала CS Internship