private void AddButton_Click(object sender, EventArgs e)
{
string path = @"Materials\MaterialName.txt";
string[] temp = File.ReadAllLines(path);
if (check.CheckExtraFields())
{
return;
}
extra.SaveToCSV(ExtraDataGridView);
File.AppendAllText(path, ExtraTextBox.Text + Environment.NewLine);
extra.RefreshCombobox();
}