public  void MakeLabels()
{
    word =  GetRandomWord();
    char[] chars = word.ToCharArray();
    int between = 330 / chars.Length;
    for (int i = 0; i < chars.Length; i++)
    {
        labels.Add(new Label());
        labels[i].Location = new Point((i * between) + 10, 80);
        labels[i].Text = "_";
        labels[i].Parent = groupBox1;
        labels[i].BringToFront();
        labels[i].CreateControl();
    }
}

static string NewWord(string src)
    {
        return src[0] + new string(src.Skip(1).Select(x => '_').ToArray());
    }

static string NewWord(string src)
    {
        return src[0] + Regex.Replace(src.Substring(1), ".", "_");
    }

string word = "слово";
string encryptWord = word[0] + (new string('_', word.Length - 1));

private string HideCharacters(string word)
{
    string res = word[0].ToString();
    for (int i = 1; i < word.Length; i++)
        res += " _";
    return res;
}

for (int i = 0; i < chars.Length; i++)
{
    labels.Add(new Label());
    labels[i].Location = new Point((i * between) + 10, 80);
    if(i!=0)labels[i].Text = "_";
    labels[i].Parent = groupBox1;
    labels[i].BringToFront();
    labels[i].CreateControl();
}

public void MakeLabels()
   {    word = GetRandomWord();
        char[] chars = word.ToCharArray();
        int between = 330 / chars.Length;
        labels.Add(new Label());
        labels[0].Location = new Point((0* between) + 10, 80);
        labels[0].Text = chars[0].ToString();
        labels[0].Parent = groupBox1;
        labels[0].BringToFront();
        labels[0].CreateControl();
       for (int i = 1; i < chars.Length; i++)
        {
            labels.Add(new Label());
            labels[i].Location = new Point((i * between) + 10, 80);
            labels[i].Text = "_";
            labels[i].Parent = groupBox1;
            labels[i].BringToFront();
            labels[i].CreateControl();
        }
    }