public void InsertRange(int index, IEnumerable <T> collection)
{
var collectionCount = collection.Count();
Deque <T> .CheckNewIndexArgument(Count, index);
if (collectionCount > Capacity - Count)
{
Capacity = checked (Count + collectionCount);
}
if (collectionCount == 0)
{
return;
}
DoInsertRange(index, collection, collectionCount);
}
public void Insert(int index, T item)
{
Deque <T> .CheckNewIndexArgument(Count, index);
DoInsert(index, item);
}