Why do we need to override hashCode and equals method C#?

It is because the framework requires that two objects that are the same must have the same hashcode. If you override the equals method to do a special comparison of two objects and the two objects are considered the same by the method, then the hash code of the two objects must also be the same.

How do you override equals in C#?

Overriding the Equals Method in C#: When overriding the Equals() method, make sure the passed-in object is not null and can be cast to the type you are comparing. When overriding Equals(), you also need to override GetHashCode(), otherwise you get a compiler warning.

How to implement hashCode and equals method?

– You need to implement the equals () and hashCode () methods for primary key classes if you map composite primary keys. – If you map an association to a Map, your map key needs to implement the equals () and hashCode () methods. – You can map one-to-many and many-to-many associations to different sub-types of Collection.

Is hashCode same for equal objects?

The hashcode () method returns the same hash value when called on two objects, which are equal according to the equals () method. And if the objects are unequal, it usually returns different hash values. It returns the hash code value for the given objects.

How and why to override the equals method in Java?

– str1 = “virat”; – str2 = “virat”; – if ( str1 == str2 ) – //true condition – if (str1.equals (str2)) – //true condition

How to override equals method in Java?

– Output: – hashCode and equals are closely related : hashCode must generate equal values for equal objects. – Implementing hashCode : It is a popular misconception that hashCode provides a unique identifier for an object. – CrunchifyImplementEqualsHashCode.java. – Eclipse Console Output: If you liked this article, then please share it on social media.