创建IList <>类型的类字段？

public class MyClass
{
    private IList<string> myList;

    public MyClass()
    {
        myList = new List<string>();
    }

    public void AddItem(string item)
    {
        myList.Add(item);
    }

    public void RemoveItem(string item)
    {
        myList.Remove(item);
    }

    public int GetCount()
    {
        return myList.Count;
    }
}