Prime Number check using C#

Here is the code snippet

public static bool IsPrime(int number)
        {
            bool IsPrime = true;
            if (number <= 1)
                return IsPrime;
            for (int i = 2; i <= Math.Sqrt(number); i++)
            {
                if (number % i == 0 && i != number)
                    IsPrime = false;
            }
            return IsPrime;
        }

Thanks, Karthik KK