C#

class A
{
  public string Name;
  public string EmailAddress;
}

class B
{
  public string Name;
  public string EmailAddress;
}

a.Name = b.Name;
a.EmailAddress = b.EmailAddress;

private void btnSaveArtist_Click(object sender, EventArgs e)
{
    // Some code here
    // ...

    // Update the necessary "Session" forms
    foreach (Form child in this.MdiChildren)
    {
        if ((child is SessionInfoForm) && (thisArtist.ContainsSession(child.Name))
            ((SessionInfoForm)child).UpdateArtistName();
    }

    // Some more code
    // ...
}

public delegate void CountReachedDelegate(IBase iBase, string Message);


public interface IBase
{
  Int32 Trigger {get;}
  String Name { get; }

  void Count(int Limit);

  event CountReachedDelegate CountReached;
}

public class SubIntA: IBase
{
  #region IBase Members

  private int _T = 20;
  public int Trigger
  {
    get { return _T; }
  }

  string _N = "A";
  public string Name
  {
    get { return _N; }
  }

  public void Count(int Limit)
  {
    for (int x = 0; x < Limit; x++)
      if (x % _T == 0)
        if (CountReached != null)
          CountReached(this, _N + "=" + x.ToString());
  }

  public event CountReachedDelegate CountReached;

  #endregion
}

/*Like SubIntA I have SubIntB, SubIntC, etc.....*/


/*This works but it is not what I want to do*/
public partial class Form1_NotWhatIWant : Form
{
  IBase A = new SubIntA();
  IBase B = new SubIntB();

  public Form1_NotWhatIWant ()
  {
    InitializeComponent();

    A.CountReached += new CountReachedDelegate(CountReached);
    B.CountReached += new CountReachedDelegate(CountReached);
  }

  void CountReached(IBase iBase, string Message)
  {
    /*show message from event in a listbox*/
    listBox1.Items.Insert(0, iBase.GetType().ToString() + ": " + Message);
  }

  private void button1_Click(object sender, EventArgs e)
  {
    A.Count(100);
  }

  private void button2_Click(object sender, EventArgs e)
  {
    B.Count(150);
  }
}




public partial class Form1_WhatIWouldLike : Form
{
  IBase A = new SubIntA();
  IBase B = new SubIntB();

  public Form1_WhatIWouldLike()
  {
    InitializeComponent();

    IBase.CountReached += new CountReachedDelegate(CountReached);
  }

  void CountReached(IBase iBase, string Message)
  {
    /*show message from event in a listbox*/
    listBox1.Items.Insert(0, iBase.GetType().ToString() + ": " + Message);
  }

  private void button1_Click(object sender, EventArgs e)
  {
    A.Count(100);
  }

  private void button2_Click(object sender, EventArgs e)
  {
    B.Count(150);
  }
}

public static void FileToImage(string path)
{
    byte[] data;

    using (FileStream fs = File.OpenRead(path))
    {
        data = new byte[fs.Length];
        ReadWholeArray(fs, data);
    }

    int i = 0;
    int numPixels = 1025;
    Bitmap bmp = new Bitmap(numPixels, numPixels);
    for (int y = 0; y < numPixels; y++)
    {
        for (int x = 0; x < numPixels; x++)
        {
            if (data[i++] == 0)
            {
                bmp.SetPixel(x, y, Color.Black);
            }
            else
            {
                bmp.SetPixel(x, y, Color.White);
            }
        }
    }

    bmp.Save(path + ".bmp");
}

private static void ReadWholeArray(Stream stream, byte[] data)
{
    int offset = 0;
    int remaining = data.Length;
    while (remaining > 0)
    {
        int read = stream.Read(data, offset, remaining);
        if (read <= 0)
            throw new EndOfStreamException
                (String.Format("End of stream reached with {0} bytes left to read", remaining));
        remaining -= read;
        offset += read;
    }
}