gistfile1.cs

private void Dispose(object sender, EventArgs e)
{
    if (ev_Click == null)
        return;
    foreach (var w in ev_Click.GetInvocationList())
    {
        using (var x = w.Target as IDisposable)
        {
            x.Dispose();
        }
    }
    countLabel.Text = "InvocationList contains " + (ev_Click == null ? 0 : ev_Click.GetInvocationList().Length) + " objects";
    memoryLabel.Text = "Memory consumption:" + GC.GetTotalMemory(true) / 1024;
}