C#

[Serializable]
public class MyNameObjectCollection : NameObjectCollectionBase
{
  private int field1;
  private string field2;
  public MyNameObjectCollection() : base()
  {
  }
  protected MyNameObjectCollection(SerializationInfo info,
    StreamingContext context) : base(info, context)
  {
    field1 = info.GetInt32("field1");
    field2 = info.GetString("field2");
  }
  public override void GetObjectData(SerializationInfo info,
    StreamingContext context)
  {
    base.GetObjectData(info, context);
    info.AddValue("field1", field1);
    info.AddValue("field2", field2);
  }
  // Rest of the implementation for your collection...
} 

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bool PreFilterMessage(ref Message msg)

MyMessageFilter mf = new MyMessageFilter();
Application.AddMessageFilter(mf);

	public abstract class DumpableObject : IDumpableObject
	{
#if DEBUG
		private DumpContext m_contextDump;
		private int m_iDumpLevel = DumpContext.DEFAULT_DUMP_LEVEL;
				
		protected int DumpLevel
		{
			get { return m_iDumpLevel; }
			set { m_iDumpLevel = value; }
		}
				
		public void DumpAll()
		{				
			DumpContext context = new DumpContext( this, m_iDumpLevel, DumpContext.DumpDetails.ALL );
		}
				
		public void Dump( DumpContext context )
		{
			m_contextDump = context;
			OnDump();
			m_contextDump = null;
		}
				
		protected virtual void OnDump()
		{
		}
				
		protected void Dump( string strName, object obj )
		{
			m_contextDump.Dump( strName, obj );
		}
#else
		protected int DumpLevel
		{
			get { return 0; }
			set { }
		}
				
		protected void DumpAll()
		{
		}
				
		public void Dump( DumpContext context )
		{
		}
				
		protected virtual void OnDump()
		{
		}
				
		protected void Dump( string strName, object obj )
		{
		}
#endif
	}