Here, you'll find a first simple code sample that works only on simple types (the ones composed only by primitif properties), and a second one that is complete (for a wider range of classes and complex types).
ちょっと横道にそれますが、上記サンプルコード（構造体の例など）にちょっと見慣れない形式のコードがいくつか見受けられます。
If a reference is no longer publicly available, should you include the proofs of the results you cite from it?
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The IEqualityComparer interface supports only equality comparisons. Customization of comparisons for sorting and ordering is provided by the IComparer interface.
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I would say that the best use would be when you need to plug in different equality rules for a certain algorithm. Much in the same way that a sorting algorithm might accept an IComparer, a finding algorithm might accept an IEqualityComparer
If you look at the definition of Distinct there is only one generic type parameter involved (and derece one TCollection used for input and output collections and one TComparison for the comparer).
To enhance all these software-related activities I maintain a blog writing there on various topics, most of which actually come back to programming.
This interface, also added in 2.0, allows you to pass custom object equality checking to a Hashtable, Dictionary and NameValueCollection. You pass in your custom comparison implementation much like you do with IComparer and the Hashtable will use this for equality checks.
Implementing IEquatable only does a comparion between your object and C# IEqualityComparer Nasıl Kullanılır which is most likely to be the same type. This is performed frequently with the new methods brought in alongside LINQ in 3.5. Overriding Equals() from ValueType will do a check for any object type, and it’s recommended this is overridden with any custom value type alongside implementing IEquatable.
So I'm derece 100% clear why C# IEqualityComparer Kullanımı you need the extra comparer. Just the single comparer should be sufficient.
The main use of this interface is you emanet write C# IEqualityComparer nerelerde kullanılıyor a single implementation of IEqualityComparer which several classes kişi then use, removing the need to rewrite the comparison logic for C# IEqualityComparer Kullanımı every class.
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