Question:Which of the following are required to be true by objects which are going to be used as keys in a System.Collections.HashTable? 

A They must handle case-sensitivity identically in both the GetHashCode() and Equals() methods. 
B Key objects must be immutable for the duration they are used within a HashTable. 
C Get HashCode() must be overridden to provide the same result, given the same parameters, regardless of reference equalityl unless the HashTable constructor is provided with an IEqualityComparer parameter. 
D Each Element in a HashTable is stored as a Key/Value pair of the type System.Collections.DictionaryElement 
E All of these 

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E 

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Mohammad Towhidul Islam

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