int数组转string数组和int数组转string中间用逗号隔开

//int 数组转string数组
int [] test={1,2,3,4};
string result=test.Select(i => i.ToString()).ToArray();

//int 数组转 string中间用逗号隔开

int [] test={1,2,3,4};
string result=string.Empty;
for (int i = 0; i < test.length; i++)
{
   if(i==test.length-1)
      result=test[i].ToString();
   else
    result=test[i]+",";
}