C#

public interface IIndexedList
{
  int Index { get; }
}

List<IIndexedListItem> newlist = new List<IIndexedListItem>();
foreach(IIndexedListItem item in list)
{
  newlist.Add(item);
}
newlist = newlist.OrderBy(p => p.Index).ToList();

List<Animal> myAnimals = (new List<Dog> { new Dog() }).ConvertAll<Animal>(delegate(Dog d) { return d; });

private Bitmap createBitmap(uint width, uint height, byte[] pixels)
{
    if (width == 0)
    {
        throw new ArgumentException("Bitmap width must be greater than 0.");
    }
    if (height == 0)
    {
        throw new ArgumentException("Bitmap height must be greater than 0.");
    }
            
    UInt32 byteCount = width * height * 4;
    System.IntPtr pPixels = System.Runtime.InteropServices.Marshal.AllocHGlobal((int)(byteCount));
    System.Runtime.InteropServices.Marshal.Copy(pixels, 0, pPixels, pixels.Length);
    Bitmap bmp = new Bitmap((int)width, (int)height, (int)width * 4, System.Drawing.Imaging.PixelFormat.Format32bppArgb, pPixels);
    System.Runtime.InteropServices.Marshal.FreeHGlobal(pPixels);

    return bmp;
}

OriginalGriff wrote:

it will be disposed later when the CG gets round to it.

Luc Pattyn wrote:

I don't expect Christian flies around the world collecting our junk.

// Different variable names used than in question!
using System;
using System.Windows.Forms;

public partial class FormStart : Form
{
    public FormStart()
    {
        InitializeComponent();
        // Clicking the form will launch the reader
        Click += new EventHandler(FormStart_Click);
    }

    private void FormStart_Click(object sender, EventArgs e)
    {
        ShowFormReader();
    }
    private void ShowFormReader()
    {
        FormReader formReader = new FormReader();
        formReader.FormClosing += new FormClosingEventHandler(formReader_FormClosing);
        formReader.Show();
        Hide();
    }
    private void formReader_FormClosing(object sender, FormClosingEventArgs e)
    {
        Show();
    }
}

FormReader formReader = new FormReader(this);

private void formReader_FormClosing(object sender, FormClosingEventArgs e)
    {
        //access member of FormReader
    }

interface IA
    {
        void M();
    }

    interface IB
    {
        void M();
    }

    class ABC : IA, IB
    {
        public void M()
        {
            MessageBox.Show("Hello");
        }
    }

ABC a = new ABC();
a.M();

FormReader formReader = sender as FormReader;
if(formReader != null)
{
    // You can now use formReader. to access any properties/methods
}