csharp AddRangeの处理内容3行目の确认

Posted 2021-05-12

public void AddRange (IEnumerable<T> collection)
{
	if (collection == ) {
		throw new ArgumentNullException ();
	}
	ICollection<T> collection2 = collection as ICollection<T>;
	if (collection2 != ) {
		this.AddCollection (collection2);
	}
	else {
		this.AddEnumerable (collection);
	}
	this._version++;
}