public void Remove(AdditionalUploadElement element)
        {
            int index = base.BaseIndexOf(element);

            if (index >= 0)
            {
                base.BaseRemoveAt(index);
            }
        }
 public void Remove(AdditionalUploadElement element)
 {
     int index = base.BaseIndexOf(element);
     if (index >= 0)
         base.BaseRemoveAt(index);
 }
 public void Add(AdditionalUploadElement element)
 {
     base.BaseAdd(element);
 }
 public void Add(AdditionalUploadElement element)
 {
     base.BaseAdd(element);
 }