ss.cpp

        private async void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFile = new OpenFileDialog();
            openFile.Filter = "PAWN files (*.pwn;)|*.pwn;";
            string file = openFile.FileName;
            if(openFile.ShowDialog() == DialogResult.OK)
            {
                String res;
                using (StreamReader r
                using (res = await r.ReadToEndAsync())
                {
                    string[] t = r.ReadToEnd();
                    textBox1.Text = t;
                }
            }
        }