C# 一个长度为100的int数组,插入1-100的随机数,不能重复,如何写

int[] intArr = new int[100]; 
ArrayList myList = new ArrayList(); 
Random rnd = new Random(); 
while (myList.Count < 100) 
{ 
　　int num = rnd.Next(1, 101); 
　　if (!myList.Contains(num)) 
　　myList.Add(num); 
} 
for (int i = 0; i <100; i++) 
{ 
　　intArr[i] = (int)myList[i]; 
　　Console.Write("{0} ", intArr[i]); 
　　Console.WriteLine(); 
}