Most classes that are used as keys in a hash table should override the GetHashCode to provide one that performs efficient hash code calculations for a specific type.

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Quizplus · Accepted Answer

This is true. Overriding the GetHashCode method is important for a hash table to efficiently retrieve items based on their keys. The default implementation of GetHashCode for object types simply returns the object's memory address, which is not very efficient for searching a hash table. By providing a custom implementation, classes can ensure that their hash codes are calculated in a way that optimizes the lookup process.

Most Classes That Are Used as Keys in a Hash