IEnumerable 🆚 IEnumerator Interfaces in C#

Today's Advanced C# Topic is: IEnumerable and IEnumerator Interfaces
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In this video you will learn what IEnumerable and IEnumerator are
What are advantages of IEnumerable and IEnumerator
When to use them
How to use them
What are advantages of using IEnumerable and IEnumerato
How IEnumerator and IEnumerable are related to lists, arrays, and other types of colletions.
The IEnumerable interface is the base Interface for many collections in C#, and its job is to provide a way of iteration through a collection. That is why we can use foreach loops to go through a List or a Dictionary. In simple English when a collection class implements the IEnumerable interface it becomes countable, and we can count each element in it individually

There are 2 versions of the IEnumerable Interface

1.IEnumerable for generic collections
2.IEnumerable for non generic collections

But since generic collections were introduced later after the non-generic ones and it is no longer recommended to use the non-generic collections in a new project due to their need to perform boxing and unboxing (converting the types of objects), we will explain how to use the IEnumerable T interface in this lesson

when it is recommended to use the IEnumerable interface:

- Your collection represents a massive database table, you don’t want to copy the entire thing into memory and cause performance issues in your application.

When it is not recommended to use the IEnumerable interface:

- You need the results right away and are possibly mutating / editing the objects later on. In this case, it is better to use an Array or a List

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