/// <inheritdoc/>
int IList.Add(object value)
{
if (value is T t)
{
using (Lock.WriteUsing())
{
int index = Backing.Count;
Backing.Add(t);
return(index);
}
}
return(-1);
}
/// <summary>
/// Sorts the list using the given selector and comparer./>
/// </summary>
public void Sort <TKey>(Func <T, TKey> selector, IComparer <TKey> comparer = null)
{
using (DeferredUpdate())
using (Lock.WriteUsing())
{
comparer = comparer ?? Comparer <TKey> .Default;
if (Backing is List <T> lst)
{
lst.Sort(new TransformComparer <T, TKey>(selector, comparer));
}
else
{
List <T> sortedItems = Backing.OrderBy(selector, comparer).ToList();
Backing.Clear();
foreach (T v in sortedItems)
{
Backing.Add(v);
}
}
}
}