Why error?

Question

Please help me with this code I don't know why it's error:
https://code.sololearn.com/cO7dfdu6yn3v/?ref=app

Answer 1

Extra semicolon at line#17. Remove the last semicolon.
Also lines #15, #16 should be
var rand = new Random();
int po = rand.Next(1000000);
int max = rand.Next(1000000);

Answer 2

Solved!