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).
If the class is defined in such a way that you yaşama't define it as IEquatable. This would include classes defined by others and classes generated by the compiler (specifically anonymous types, which use a property-wise comparison by default).
If a reference is no longer publicly available, should you include the proofs of the results you cite from it?
演算子（==）と（!=）のオーバーロードを実装します（推奨・必須ではない）
Your GetHashCode implementation always returns the same value. Distinct relies on a good hash function to work efficiently because it internally builds a hash table.
If you change your class to implement IEquatable instead, the implementation of Distinct (which will use EqualityComparer.Default which in turn sees your type implements IEquatable and delegates to that) will work bey you expect.
Basically you could check all the properties you want to check in Equals via reflection. To C# IEqualityComparer Temel Özellikleri ve Kullanımı filter some of them out use an attribute on those properties:
While MSDN is a valuable resource, don't take everything MSDN says birli gospel. MSDN contains plenty of bad advice, outdated, badly written or plain C# IEqualityComparer Nasıl Kullanılır wrong content.
So what happens when it comes time to actually deduce the type argument? We have two candidates: Position and BaseClass. Both satisfy C# IEqualityComparer Nasıl Kullanılır the stated bounds. Position satisfies the first bound because it is identical to the first bound, and satisfies the second bound because it is smaller than the second bound.
into account, so the fact that it chooses a type that is incompatible with the assigned-to variable is hamiş it's business.
Diyelim ki formunuzdaki textboxları listenize doldurdunuz yalnızca Text’i boş olan textboxları bulmanız gerekiyor. Bunun derunin List u kullanmanız gerekir. Yukarıda anlattığımız örneği mahdut olarak yapacak olursak;
Yeni bir referans tipi değmeslekkeni oluşturulduğunda, sadece bir referans oluşturulur ve bellekteki veri bu referansın gösterdiği yerde saklanır.
Typically I'd write MyCustomeComparer which implements IEqualityComparer and pass a MyCustomeComparer C# IEqualityComparer Kullanımı object around to whichever objects that need it - I'm sure you're aware of this usage.
I'm glad the post was of some value to you. If you are looking to avoid common problems arising with LINQ, you may also like my post C# IEqualityComparer Nasıl Kullanılır diving into what deferred nature of some LINQ methods means to a programmer: [^]