C# 实现M-N之间随机取K个不重复的数

public static int[] arrayRandom(int min,int max, int count) {
    //生成有序数list
    List<int> originList = new List<int>();
    int listcount = max - min + 1;
    for (int i = 0; i < listcount; i++) 
    {
        originList.Add(i + min);
    }
    //生成随机数list
    List<int> callback = new List<int>();
    Random random = new Random();
    for (int i = 0; i < count; i++) 
    {
        int place = random.Next(0, listcount - i);
        callback.Add(originList[place]);
        originList.Remove(originList[place]);
    }
    return callback.ToArray();
}