/// <summary>
 /// Adds a range of <see cref="CustomData"/> instances to the collection.
 /// </summary>
 public void AddRange(CustomData[] items)
 {
     base.AddRange(items);
 }
 /// <summary>
 /// Adds a <see cref="CustomData"/> instance to the collection.
 /// </summary>
 public int Add(CustomData item)
 {
     return base.Add(item);
 }