private void AddUserClick(object sender, RoutedEventArgs e) { var fileModel = new Person { //Id = new Guid(), Name = txtName.Text, LastName = txtLastName.Text, Department = txtDepartment.Text, DateTime = DateTimeOffset.Now, Photo = Convert.ToBase64String(image) }; var client = new WebApiSender(urlAddress); client.AddPerson(fileModel); MessageBox.Show("File has been uploaded"); }