ERROR STRING + after convertion from int use using .TOSTRING

hi, unity seys that there are a error bouce + cent be applicated to string…
I have 2 int that are veci and high, but if i use + only with veci thre arent error but when i add also HIGH or if i use only high unity say:
OPERATOR ‘+’ CANNOT BE APPLIED TO OPERANDS OF TYPE STRING AND METHOD GROUP.

EROOR → GU.text = "Score: " + veci.ToString + “High Score:” + HIGH.ToString;
ERROR → GU.text = "Score: " + “veci.ToString” + “High Score:” + HIGH.ToString;

RIGHT → GU.text = "Score: " + veci.ToString + “High Score:” + “HIGH.ToString”;

ToString is a function, so you have to use parentheses even when there are no parameters.

GU.text = "Score: " + veci.ToString() + "High Score: " + HIGH.ToString();

ToString() is a method. So it needs ().