naveentej

 Profile Answers by naveentej 

• Jan 8th, 2006

 

Ans: B

In the System.Object class, equals() is defined as

public virtual bool Equals(object obj);

 

learnasp

 Profile Answers by learnasp 

• Oct 11th, 2007

 

You also need to override the GetHashCode method if you override the equals method.

• Override the GetHashCode method to allow a type to work correctly in a hash table.
• Do not throw an exception in the implementation of an Equals method. Instead, return false for a null argument.
• Follow the contract defined on the Object.Equals Method as follows:
  • x.Equals(x) returns true.
  • x.Equals(y) returns the same value as y.Equals(x).
  • (x.Equals(y) && y.Equals(z)) returns true if and only if x.Equals(z) returns true.
  • Successive invocations of x.Equals(y) return the same value as long as the objects referenced by x and y are not modified.
  • x.Equals(null) returns false.