Play with something like:
private String GetRelativePath(Int32 level, String directory, out String errorMessage) { if (level < 0 || level > 5) { errorMessage = "Find some more smart input data"; return String.Empty; } // ========================== while (level != 0) { directory = Path.GetDirectoryName(directory); level -= 1; } // ========================== errorMessage = String.Empty; return directory; }And test it
[Test] public void RelativeDirectoryPathTest() { var relativePath = GetRelativePath(3, AppDomain.CurrentDomain.BaseDirectory, out var errorMessage); Console.WriteLine(relativePath); if (String.IsNullOrEmpty(errorMessage) == false) { Console.WriteLine(errorMessage); Assert.Fail("Can not find relative path"); } }