using System;
using System.IO;
public class Program
{
public static void Main()
Console.WriteLine(Path.GetDirectoryName("c:/tester/blah"));
var s = @"С—-";
for (int i = 0; i < s.Length; i++)
Console.WriteLine($"s[{i}] = '{s[i]}' ('\\u{(int)s[i]:x4}')");
}