//Visual Basic 2010 Collecties - Inleiding Object Oriented Programming
public class SentenceTestFixture {
    void Main() {
        Sentence sentence1 = new Sentence();
        Console.WriteLine((sentence1.Count == 0));
        Console.WriteLine((sentence1.IndexOf("Hello") == -1));
        Console.WriteLine((sentence1.Contains("Hello") == false));
        sentence1.Add("Hello");
        Console.WriteLine((sentence1.Count == 1));
        Console.WriteLine((sentence1.Item(0) == "Hello"));
        Console.WriteLine((sentence1.IndexOf("Hello") == 0));
        Console.WriteLine((sentence1.Contains("Hello") == true));
        Console.WriteLine((sentence1.IndexOf("World") == -1));
        Console.WriteLine((sentence1.Contains("World") == false));
        sentence1.Add("World");
        Console.WriteLine((sentence1.Count == 2));
        Console.WriteLine((sentence1.Item(0) == "Hello"));
        Console.WriteLine((sentence1.Item(1) == "World"));
        Console.WriteLine((sentence1.IndexOf("Hello") == 0));
        Console.WriteLine((sentence1.Contains("Hello") == true));
        Console.WriteLine((sentence1.IndexOf("World") == 1));
        Console.WriteLine((sentence1.Contains("World") == true));
        Console.ReadLine();
    }
}
public class Sentence {
    private string[] m_Words = new string[0];
    public virtual int Count {
        get {
            Count = this.m_Words.Length;
        }
    }
    public virtual string this[int index] {
        get {
            if (((index >= 0) 
                        && (index < Count))) {
                Item = this.m_Words(index);
            }
        }
    }
    public virtual void Add(string word) {
        this.m_Words((Count - 1)) = word;
    }
    public virtual void IndexOf(string word) {
        IndexOf = -1;
        if ((Count > 0)) {
            bool found;
            for (bool _do1 = true; _do1; _do1 = (found 
                        || (IndexOf 
                        == (Count - 1)))) {
                this.IndexOf += new System.EventHandler(1);
                found = (this.Item(IndexOf) == word);
            }
            if ((found == false)) {
                IndexOf = -1;
            }
        }
    }
    public virtual void Contains(string word) {
        Contains = (this.IndexOf(word) != -1);
    }
}
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//Copyright - De Wolf / vbvoorbeelden - 2003-2011 - Alle rechten voorbehouden.