C# yield return: Understanding Iterator Methods

In C#, the yield return keyword is used to define an iterator method within an enumerable collection. By using yield return, it is possible to implement custom iterator logic more simply and clearly without having to implement a complete class or interface.

Specifically, the yield return keyword can be used in iterator methods to return elements from a sequence one at a time, pausing execution each time the iterator method is called and returning control to the caller. This allows developers to return elements of a sequence individually, without having to create the entire sequence at once. This can reduce memory usage, improve performance, and enhance the readability of the code.

In conclusion, using yield return makes writing and using iterator methods simpler and more flexible.