C# Indexer example

public class SampleIndexer
{
    private readonly Dictionary<string,Dictionary<string, string>> list = new Dictionary<string,Dictionary<string, string>>();        

    public SampleIndexer()
    {
        list.Add("One",new Dictionary<string, string>());
        list.Add("Two", new Dictionary<string, string>());
    }

    public void Add(string name, string key, string value)
    {
        list[name].Add(key,value);
    }

    public Dictionary<string,string> this[string name]
    {
        get
        {
            return list[name];
        }
    }

    public string this[string name, string key]
    {
        get
        {
            return list[name][key];
        }
    }
}

[TestFixture]
public class TestIndexer{

    [Test]
    public void Test()
    {
        SampleIndexer indexer = new SampleIndexer();
        indexer.Add("One","key1","value1");
        indexer.Add("Two","key2","value2");

        Console.WriteLine(indexer["One"]["key1"]);
    }
}