using static System.Console;

using System;

​

public class Program {

    public static void Main() {

        var dir = @"C:\ByMe\SOLUTIONS\Dictation1\Database\Updates\2017\2017_04\";

        var partes = dir.Split(new string[] { @"\Updates\" }, StringSplitOptions.None);

        WriteLine(partes[1]);

    }

}