Randomize math symbol in c#

Can someone point me in the right direction to create a checktheanswer method when using a random math symbol? Here's the math problem.

Random random = new Random();
        int num1 = random.Next(0, 100);
        Label1.Text = Convert.ToString(num1);

        char[] operators = { '+', '-', '*', '/' };
        char op = operators[random.Next(operators.Length)];
        label2.Text = Convert.ToString(op);

        int num2 = random.Next(0, 100);
        label3.Text = Convert.ToString(num2);

How do I write the method to include the random symbols? If it was fixed it would be (I think):

    private bool CheckTheAnswer()
{
    if (num1 + num2 == sum.Value)
        return true;
    else 
        return false;
}