If two objects compare birli equal, the GetHashCode method for each object must return the same value. However, if two objects do hamiş compare bey equal, the GetHashCode methods for the two object do hamiş have to return different values.

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g. MyType and Object) which will still use the identity comparison. I suspect it's hamiş a great idea to do this unless it's going to be a very heavily used type in your code, where everyone will become very familiar with it and

Equals and object.ReferenceEquals. Equals is meant to be overridden for whatever sort of comparison makes the most sense for a given type, whereas ReferenceEquals emanet't be overridden and always compares by reference.

As an example, it might make sense for two different instances of an Employee class to be considered equal if they both represent the same entity in your system.

The following example defines a NanComparer class that implements the IStructuralEquatable interface. It compares two Double or two Single values by using the equality operator. It passes values of any other type to the default equality comparer.

After some more testing I found that any two arrays with the same first element have the same hash. I still think this is strange behavior.

Fakat, articles1 ve articles3 dizileri aynı makale mebdelıklarına farklı sıralarda sahip evetğundan, CompareTo metodu farklı bir valör döndürür ve bu dizilerin konstrüktif olarak denktaş olmadığını belirtir.

The reason why you need the IStructuralEquatable is for defining a new way of comparision that would be right for all the objects .

In addition to this awesome blog Frank and I also dicussed all of this awesome in detail on Merge Conflict on episode 111:

Amma velakin bu konstrüksiyonız class denli kompleks işlemler için tasarlanmış bir yapı C# IStructuralEquatable Temel Özellikleri gerektirmiyorsa ve tutulacak verileri enkapsüle geçirmek yetiyorsa işte bu suret durumlarda struct yapısını yeğleme edebiliriz.

Beli, makalede eksiklikler olur. Bunu tenkit olarak akseptans ediyorum. Işlevsel programlamada struct kullanılmasının nedenini de bilmiyor, performans ve başka konular üzerine da herhangi bir düşün çitndırmıyorum. Siz biliyorsanız lütfen aydınlatır mkaloriız?

Default property. The second time, it passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third time, it passes the custom NanComparer object. As the output from the example shows, the first three method calls return true, whereas the fourth call returns false.

However, this is not so great if you are using the struct in a dictionary as my good friend Dustin mentioned to me because a Dictionary will always use the object version of Equals, which falls back to boxing :(