class SampleCollectionT>
{
    private T[] arr = new T[100];
    public T this[int i]
    {
        get
        {
            return arr[i];
        }
        set
        {
            arr[i] = value;
        }
    }
}
class Program
{
    static void Main(string[] args)
    {
        SampleCollectionstring> stringCollection = new SampleCollectionstring>();
        stringCollection[0] = "Hello, World";
        System.Console.WriteLine(stringCollection[0]);
    }
}