OpenFileDialog openFileDialog1 = new OpenFileDialog();
            openFileDialog1.Filter = "CSV files (.csv)|*.csv";
            openFileDialog1.FilterIndex = 1;

            if (openFileDialog1.ShowDialog() == DialogResult.OK) // Test result.
            {
                try
                {
                    string file = openFileDialog1.FileName;//reads path to file

                    NameValueCollection nvc = new NameValueCollection();
                    HttpUploadFile("http://192.168.1.48:5001",
                         file, "file", "file/csv", nvc);


                }

                catch (Exception ex)
                {
                    MessageBox.Show("Error: Could not read file from disk. Original error: " + ex.Message);
                }
            }
        }