用于在路径列表中过滤顶级目录的算法，C＃

Question

输入：

/dir1
/dir1/subdir
/dir1/subdir/sub-subdir
/dir2

输出应为：

/dir1
/dir2

Answer 1

这个怎么样：

string inputDir = "/dir1/subdir/sub-subdir";
string [] Split = inputDir.Split(new Char [] {'/'}, StringSplitOptions.RemoveEmptyEntries); 
string outputDir = Split[0];

Answer 2

List<string> result= new List<string>();  

foreach (string i in input)
{
   string[] tmp = i.split(@"/");
   result.add(@"/" + tmp[0]);
}