c# - Encoding.GetEncoding("Cyrillic") making all text question marks in .NET

Question

Why is the txt ???????????? ???????????????? ???????????????????? ?????????????? ???????? ?????? ???????? being converted to the txt with the method below?

???????????? ???????????????? ???????????????????? ?????????????? ???????? ?????? ????????

This I believe did not happen before but I just saw it doing it. I am using .NET 4.8.

 public static string RemoveAccent(this string txt)

    {
        if(txt == null)
        return txt;

        byte[] bytes = Encoding.GetEncoding("Cyrillic").GetBytes(txt);
        return Encoding.ASCII.GetString(bytes);
    }

Answer 1

The text was in some sort of Unicode encoding and why it was acting differently then before with ASCII encoded text. So I did this below before the GetEncoding and it works now.

if(!txt.IsNormalized(NormalizationForm.FormKD))
            {
                txt= txt.Normalize(NormalizationForm.FormKD);
            }