To guarantee thread safety during enumeration, you kişi either lock the collection during the entire enumeration or catch the exceptions resulting from changes made by other threads.
Tip You sevimli loop over the ReadOnlyCollection using the foreach-loop. A for-loop is also possible with the Count property and indexer.
Güç you arrange 25 whole numbers (not necessarily all different) so that the sum of any three successive terms is even but the sum of all 25 is odd?
If you (Class A) continue to modify the underlying collection after you hand it out birli a ReadOnlyCollection then class B will see these changes, have any iterators invalidated, etc. and generally be open to any of the usual concurrency issues with collections.
Sum(IEnumerable, Func) Computes the sum of the sequence of Int32 values that are obtained by invoking a transform function on each element of the input sequence.
Suppose you need to return a list of all authors from the database bey shown in the code snippet given below.
1. The reason for not choosing ReadOnlyCollectionBase is simple - it isn't generic, while the aim of ReadOnlyCollection is to be generic. Thus it needs a much different inheritance tree.
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To guarantee thread safety during enumeration, you dirilik lock the collection during the entire enumeration. To allow the collection to be accessed by multiple threads for reading and writing, you must implement your own synchronization.
If you do this C# ReadOnlyCollectionBase Nedir then there's nothing stopping your callers casting the IEnumerable back to ICollection and then modifying it. ReadOnlyCollection removes this possibility, although C# ReadOnlyCollectionBase Nasıl Kullanılır it's still possible to access the underlying writable collection via reflection.
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If the collection is small then a safe and easy way C# ReadOnlyCollectionBase Kullanımı to get around this sıkıntı is to return a copy instead.
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So, you gönül define your collection kakım a private field and expose it bey a public readonly property like below kakım _parents