.NET (Core and Framework)

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#region P/Invoke stuff<br />
[DllImport("ws2_32.dll")]<br />
private static extern short htons(short val);<br />
<br />
[DllImport("ws2_32.dll")]<br />
private static extern long htonl(long val);<br />
#endregion<br />
<br />

namespace MyNamespace
{
  public class MyClass
  {
        #region P/Invoke stuff
        [System.Runtime.InteropServices.DllImport("ws2_32.dll")]
        private static extern short htons(short val);

        [System.Runtime.InteropServices.DllImport("ws2_32.dll")]
        private static extern long htonl(long val);
        #endregion

  }
}

namespace MyNamespace
{
        #region P/Invoke stuff
        [System.Runtime.InteropServices.DllImport("ws2_32.dll")]
        private static extern short htons(short val);

        [System.Runtime.InteropServices.DllImport("ws2_32.dll")]
        private static extern long htonl(long val);
        #endregion

}

Me.DesktopLocation = New System.Drawing.Point(loc.Right,(loc.Bottom -<br />
loc.Top)/2)

public interface IHasItems
{
	IList Items
	{
		get;
	}
}

public class ListBoxEx: ListBox, IHasItems // inherit from ListBox, implement IHasItems
{
...
}

function(IHasItems theControl)
{
// At this point I know that the control has an items property
theControl.Items.Clear();
}

public void function(IList items)
{
    items.Clear();
}

ComboBox combo = new ComboBox();
ListBox listBox = new ListBox();

function(combo.Items);
function(listBox.Items);

using System.Reflection;
   
//Will throw a NullReferenceException if the Control doesn't have an Items property

object collection = ctrl.GetType().GetProperty("Items").GetValue(ctrl, null);
collection.GetType().GetMethod("Clear").Invoke(collection, null);

object collection = ctrl.GetType().GetProperty("Items").GetValue(ctrl, null);
((IList)collection).Clear();