As you know, GetHashCode returns a semi-unique value that can be used to identify an object instance in a collection. As a good practice, it is recommended to override this method and impleme...

I've wondered about this, so I figure I'll ask it. Most places you'll see use the same semantic logic for overriding Equals as GetHashCode for memberwise equality...however they usually use differ...

From ValueType.cs **Action: Our algorithm for returning the hashcode is a little bit complex. We look ** for the first non-static field and get it's hashcode. If the type has no ** non-static f...

I have override GetHashCode and Equals and both methods provide same results for different objects but why still getting false ? class Program { static void Main(string[] args) { Console.Write...

Hey all, I've been reading up on the best way to implement the GetHashCode() override for objects in .NET, and most answers I run across involve somehow munging numbers together from members that a...

I'm working on writing a compiler for a language running on .net and one of the things I would like it to do is to automatically generate the GetHashCode method, but I have several questions: Is ...

Folks, here's a thorny problem for you! A part of the TickZoom system must collect instances of every type of object into a Dictionary<> type. It is imperative that their equality and hash cod...

I was wondering whether the .Net HashSet<T> is based completely on hash codes or whether it uses equality as well? I have a particular class that I may potentially instantiate millions of in...

I have such a class: public class Cycle { public List<int> Edges { get; private set; } public override bool Equals(object obj) { Cycle cycle = (Cycle)obj; var list1 = cycle....

According to MSDN, a hash function must have the following properties: If two objects compare as equal, the GetHashCode method for each object must return the same value. However, if two objects ...

My question may duplicate Default implementation for Object.GetHashCode() but I'm asking again because I didn't understand the accepted answer to that one. To begin with I have three questions abo...

I have an object for which I want to generate a unique hash (override GetHashCode()) but I want to avoid overflows or something unpredictable. The code should be the result of combining the hash c...

Basically, I have the following so far: class Foo { public override bool Equals(object obj) { Foo d = obj as Foo ; if (d == null) return false; return this.Equals(d); } #region IEquatabl...

Everytime I write some data class, I usually spend so much time writing the IEquatable implementation. The last class I wrote was something like: public class Polygon { public Point[] Vertices {...

I've read about 10 different questions on when and how to override GetHashCode but there's still something I don't quite get. Most implementations of GetHashCode are based on the hash codes of the ...

I read most questions on StackOverflow with regards to GetHashCode. But I am still not sure whether I have to override GetHashCode on reference types. I picked up the following from someones answer...