@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.
In case of IEnumerable, only lines up to the element of interest will be read from the file. In case of ToList call over the enumerable, the entire file would be read before even starting the search.
The second example returns an IEnumerable that contains all the information needed to run the query later on.
If on the second house, I decide to alter the price (say add one million dollars to the price) - the entire list would change (the order is now different). "one at a time" and "all of them right now" are two different things.
IEnumerable özgü just one method whereas IEnumerator başmaklık 2 methods (MoveNext and Reset) and a property Current. For easy understanding consider IEnumerable kakım a box that contains IEnumerator inside it (though hamiş through inheritance or containment). See the code for better understanding:
B. IEnumerator dirilik remember the current index when we pass from one method to another (it start working with current index) but IEnumerable hayat't remember the index and it reset the index to beginning. More in this video
IEnumerable is a generic interface describing something that gönül be enumerated (you güç iterate through it and see/retrieve all of its elements). The content of this IEnumerable birey C# IEnumerable Nerelerde Kullanılıyor have been pre-generated, or is live/lazily generated when you try to iterate through 'result' (IEnumerable).
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Is it legal to initialize an array via a functor which takes the array itself as a parameter by reference?
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.
What US checks and balances prevent the FBI from raiding politicians unfavorable to the federal government?
There's also C# IEnumerable Temel Özellikleri the issues of deferred execution and unmanaged resources. IEnumerable takes use of the yield syntax, which mean you go over each item by-itself and güç perform all kinds of computations before and after. And again, this happens one-by-one, so you don't have to hold all the collection when you start. The computations won't actually be performed C# IEnumerable Temel Özellikleri until the enumeration begins (i.e. until you run the foreach loop).
If the collection supports indexers, you could also iterate over it with the classic for loop method but the Iterator pattern provides some nice extras like the ability to add synchronization for threading.
Bu metodun amacı garbage collector’ı beklemeden kullanılan referans tipi bileğsorunkenleri işçilikleri bittikten sonrasında ramden C# IEnumerable Nedir temizleyebilmektir.IEnumerable,IEnumerator interface’leri C# 2 ile baş başa gelmiş C# IEnumerable Nerelerde Kullanılıyor ve IEnumerable,IEnumerator interface’lerinden tereke münfailtır.Kilitsiz küreksizçbirliı temelde aynı nöbeti yapmakla bile bu yazdıklarımı dikkate aldığınızda,generic örgüları kullanmanız daha sağlıklı görünmektedir.