here is the solution i have done . and its working .
foreach(var dir in Input_Folders)
{
string f = dir;
for (int i = 0; i <= n; i++)
{
string path = sub_dir(f);
f = path;
}
}
n is the nth child and the method sub_dir(string) is
public string sub_dir(string path)
{
string[] direct = Directory.GetDirectories(path);
string s = direct[0];
return s;
}
this will go to the nth child of the each input directory .. check this out .
solved Getting Nth sub-directory’s files from an input path