从1～22中产生5个随机数,不能有重复的,怎么控制没有重复的,算法怎么写……

从初始化好的数组中取
public static int[] GetRandomSequence2(int total)
{

int[] sequence = new int[total];
int[] output = new int[total];

for (int i = 0; i < total; i++)
{
sequence[i] = i;
}

Random random = new Random();

int end = total - 1;

for (int i = 0; i < total; i++)
{
int num = random.Next(0, end + 1);
output[i] = sequence[num];
sequence[num] = sequence[end];
end--;
}

return output;
}