将变量四舍五入到小数点后两位

Question

        double c = Math.Sqrt(a * a + b * b);
        Math.Round(c, 2);

        Console.WriteLine("A= " + a);
        Console.WriteLine("B= " + b);
        Console.WriteLine(therefore c = " + c;

如果 b = 44 并且 a = 32 我如何使 c 只有 2 个小数位请帮助