How to get my project path?

private void btn_upload_Click(object sender, EventArgs e)

        {

            OpenFileDialog op1 = new OpenFileDialog();

            op1.Multiselect = true;

            op1.ShowDialog();

            op1.Filter = "allfiles|*.xls";

            textBox1.Text = op1.FileName;

            int count = 0;

            string[] FName;

            foreach (string s in op1.FileNames)

            {

                //string startupPath1 = System.IO.Directory.GetCurrentDirectory();

                //string startupPath = Environment.CurrentDirectory;

                string wanted_path = Path.GetDirectoryName(Path.GetDirectoryName(System.IO.Directory.GetCurrentDirectory()));

                FName = s.Split('\\');

                File.Copy(s, wanted_path + "\\Upload\\ " + FName[FName.Length - 1]);

                count++;

            }

            MessageBox.Show(Convert.ToString(count) + " File(s) copied");

        }