Random Number Generation in C# errors out

So i am trying to generate a random number and if the number is 3 or 8 i what something to happen , it this case to add 1 to one of the 2 integers

keep in mind i really am only going off a book in C# and some knowledge in VB

    int Number1 = 0;
    int Number12 = 0;
    string text;
    string text2;

    Exexs:

    Random rnd = new Random();
    int month = rnd.Next(1, 10);

    if (month = 8)
    {
        Number1++;


    }
    else if (month = 3)
    {
        Number12++;
    }
    if (Number1 = 1)
    {
        text = "*";
    }


    goto Exexs;
}

}