C# Linq doesn't recognize Czech characters while reading from .csv file

Basically, when trying to get a .csv file into a list using Linq, all characters with diacritics turn into <?> character. What should i do to make the code keep them as in the .csv file?

using (StreamReader ctec = new StreamReader(souborovejmeno))
            {
                var lines = File.ReadAllLines(souborovejmeno).Select(a => a.Split('\t'));
                var csv = from line in lines
                          select (from piece in line
                          select piece).ToList();

                foreach (var c in csv)
                {
                    hraci.Add(new Hrac(c[0], c[1]));
                    listBox1.Items.Add(c[0]);
                }
            }

Thanks in advance for answers. Sorry if this is quite dumb, i am not too experienced in coding.

>Solution :

Try to include an encoding like that:

var lines = File.ReadAllLines(path, Encoding.UTF8).Select(a => a.Split('\t'));

Make sure to import System.Text