OpenFileDialog openFile = new OpenFileDialog();
            openFile.Filter = "Images (*.png;)|*.png;";

            if (openFile.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    var client = new WebClient();
                    client.Credentials = new NetworkCredential("Логин", "Пароль");
                    client.UploadFile("http://craft-book.96.lt/", openFile.FileName);
                }
                catch
                {
                    Clics.Text = "Ошибка";
                }
            }