Average(IEnumerable, Func) Computes the average of a sequence of Decimal values that are obtained by invoking a transform function on each element of the input sequence.
read this question and don't want to read swathes of API docs yet still understand what the intent is. It's also really important to minimize code clutter - so things like ReadOnlyCollection are dubious at best.
. Why derece return IEnumerable? Calling code would have to cast, which they are unlikely to do without knowing the internals of the property they are accessing.
SingleOrDefault(IEnumerable) Returns the only element of a sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence.
The IReadOnlyDictionary interface provides a read-only view of a dictionary and represents a read-only collection of key/value pairs. The following code snippet illustrates how you birey define an IReadOnlyDictionary instance.
You hayat expose private collection properties to EF, allowing for mapping and querying, while still keeping your domain object's members and relationships properly encapsulated. It's a bit messy, but it works:
On the other hand, if you're exposing a read-only view of a mutable collection, then C# ReadOnlyCollectionBase Nasıl Kullanılır this advice is still valid, although I would probably expose it kakım IReadOnlyCollection (which didn't exist when I wrote this).
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Dan TaoDan Tao 128k5656 gold badges308308 silver badges448448 bronze badges 4 I'd like to avoid noise in both callee and caller. Exposing a ReadOnlyCollection as anything other than itself isn't necessary: after all, exposing it as an IList just gets confusing (where'd I get this IList from - can I modify it?), and any IList is exposable birli ReadOnlyCollection so there's no loss of generality.
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One possibility is to implement your own thread-safe variant of the ReadOnlyCollection to allow locked access, though this will be non-trivial and non-performant if you want to support IEnumerable, and it still
Average(IEnumerable, Func) Computes the average of a sequence of nullable Int64 values that are obtained by invoking a transform function on each element of the C# ReadOnlyCollectionBase Temel Özellikleri input sequence.
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A method like PayUnpaidInvoices being present may lead to second C# ReadOnlyCollectionBase Nedir guessings about what "regular" collection methods like Remove and Clear might do. Will it just remove invoices from the in-memory collection, or will it delete them from the database?