private void loadDictBut_Click(object sender, EventArgs e) // apre un form e legge il percorso del file.txt
        {
            FormDict fd = new FormDict();
            DialogResult result = fd.ShowDialog();
            if (result == DialogResult.OK)
            {
                path = fd.path;
            }
        }

private void randomWordBut_Click(object sender, EventArgs e) 
        {
            int numParole, d = 0;
            dict = new string[2];
            Random rand = new Random((int)DateTime.Now.Millisecond);
            StreamReader sr = new StreamReader(path);
            numParole = dict.GetLength(d);
            dict = File.ReadAllLines(path);
            numParole = dict.Length;
            nRand = rand.Next(0, numParole - 1);
            wordBack = dict[nRand].ToUpper();
            _setWord();
        }