public void AddRange(IEnumerable <T> collection)
{
if (collection == null)
{
throw new ArgumentNullException(nameof(collection));
}
var oldRaiseEventsValue = RaiseListChangedEvents;
var start = this.Items.Count;
var ammount = collection.Count();
try
{
RaiseListChangedEvents = false;
foreach (var value in collection)
{
Add(value);
}
}
finally
{
RaiseListChangedEvents = oldRaiseEventsValue;
ListRangeChanged?.Invoke(this, new RangeChangdEventArgs(start, ammount, RangeChangeType.Add));
}
}
public void RemoveRange(int start, int ammount)
{
if (start + ammount > Items.Count)
{
throw new IndexOutOfRangeException();
}
var oldRaiseEventsValue = RaiseListChangedEvents;
var items = new List <T>();
try
{
RaiseListChangedEvents = false;
for (int index = start; index < start + ammount; index++)
{
items.Add(Items[index]);
base.RemoveItem(index);
}
BeforeRemoveRange?.Invoke(this, items);
}
finally
{
RaiseListChangedEvents = oldRaiseEventsValue;
ListRangeChanged?.Invoke(this, new RangeChangdEventArgs(start, ammount, RangeChangeType.Remove));
}
}