Given full path, check if path is subdirectory of some other path, or otherwise

Question

I have 2 strings - dir1 and dir2, and I need to check if one is sub-directory for other. I tried to go with Contains method:

dir1.contains(dir2); 

but that also returns true, if directories have similar names, for example - c:\abc and c:\abc1 are not sub-directories, bet returns true. There must be a better way.

Answer 1

DirectoryInfo di1 = new DirectoryInfo(dir1); DirectoryInfo di2 = new DirectoryInfo(dir2); bool isParent = di2.Parent.FullName == di1.FullName; 

Or in a loop to allow for nested sub-directories, i.e. C:\foo\bar\baz is a sub directory of C:\foo :

DirectoryInfo di1 = new DirectoryInfo(dir1); DirectoryInfo di2 = new DirectoryInfo(dir2); bool isParent = false; while (di2.Parent != null) {     if (di2.Parent.FullName == di1.FullName)     {         isParent = true;         break;     }     else di2 = di2.Parent; }