关于List.ToArray()方法的效率测试

var a = new List<int>();
for (int i = 0; i < 10000; i++)
{
a.Add(i);
}
DebugHelper.StartWatch();
foreach (var i in Enumerable.Range(0, 10000))
{
a.ToArray();
}
DebugHelper.StopWatch();

public T[] ToArray()
{
T[] array = new T[this._size];
Array.Copy(this._items, 0, array, 0, this._size);
return array;
}