static void Main(string[] args)
{
VocabularyWord word1 = new VocabularyWord("happy");
VocabularyWord word2 = new VocabularyWord(null);
Console.WriteLine(word1.Equals(word2));
Console.ReadLine();
}
public override bool Equals(object word)
{
if (word != null)
{
VocabularyWord that = word as VocabularyWord;
return(this.Word == that.Word);
}
return(false);
}
