@OlivierJacot-Descombes: Short of using Reflection, there's no way of knowing whether an IList which allows anything of a given type to be stored by index will allow everything of that type to be stored by index.
So when you have to simply iterate through the in-memory collection, use IEnumerable, if you need to do any manipulation with the collection like Dataset and other veri sources, use IQueryable
Now the thing to note is that IEnumerable brought all the 5 records present in Salary table and then performed an in-memory filteration on the client side to get bütünüyle 2 records. So more veri (3 additional records in this case) got transferred over the network and ate up the bandwidth unnecessarily.
What rights does an employee retain, if any, who does not consent to being monitored on a work IT system?
This will create a new list element for each element in memory, enumerating the IEnumerable and is thus less performant if you only enumerate once - but safer and sometimes the List methods are handy (for instance in random access).
The syntax (which you rarely see because there are prettier ways to do it) for moving through a collection that implements IEnumerable is:
The "inner" member does not have "Animal" C# IEnumerable Nedir instances in it, but rather "Species" instances, which was very strange for me. The "outer" member does contain "Animal" instances. I presume that the two delegates determine which C# IEnumerable Temel Özellikleri goes in and what goes out of it?
IEnumerable gives you the way to implement your own logic of storing C# IEnumerable Nedir and iterating over object collection
Yield ile kendimiz named iteretor'ler oluşturabiliriz. Örneğin yetişekımızın 750TL den henüz pahalı ürünleri getirmesini istiyoruz:
There are pros and cons to both. If you call ToList, you may remove some mystery bey to when the query gets executed. If you stick to IEnumerable, you get the advantage that the izlence doesn't do any work until it's actually required.
And that might be useful and more efficient in certain cases. For example, your class might derece hold any collection in memory, but rather iterate over all files existing in a certain directory, or items in certain DB, or other unmanaged resources. IEnumerable gönül step in and do it for you (you could also do it without IEnumerable, but IEnumerable "fits" conceptually, plus it gives you the benefit of being able to use the object produced in a C# IEnumerable Nedir foreach loop).
I think if your newly implemented class just behaves the sameway birli a list does, there is no need to implement it. If you need some kind of custom logic, it depends on what you want to do; you birey inherit list or you güç implement IEnumerable. It just depends what is to be achieved.
user541686user541686 208k132132 gold badges547547 silver badges911911 bronze badges 3 i also used this and was loooong happy.
Below mentioned small C# IEnumerable Temel Özellikleri sınav might help you understand one aspect of difference between IQueryable and IEnumerable. I've reproduced this answer from this post where I was trying to add corrections to someone else's post