this is my code in C#, I got just 8.22 can someone help.

using System; using System.Collections.Generic; using System.IO; class Solution { static void Main(String[] args) { /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */ // int l = int.Parse(Console.ReadLine()); // int r = int.Parse(Console.ReadLine());

    string[] lr = Console.ReadLine().Split(' ');        
    long l = Convert.ToInt64(lr[0]);
    long r = Convert.ToInt64(lr[1]);
    long sum = 0;
    for (long number = l; number <= r; number++)
    {
        double lps = Math.Floor(Math.Sqrt(number));
        double ups = Math.Ceiling(Math.Sqrt(number));


        for (int i = 2; i < number / 2; i++)
        {
            if (i >= lps && lps > 2) { break; }
            if (lps % i == 0 && lps > 2)
            {
                lps--;
                i = 1;
            }
        }

        for (int i = 2; i < number / 2; i++)
        {
            if (i >= ups) { break; }
            if (ups % i == 0)
            {
                ups++;
                i = 1;
            }
        }

        if (number == (lps * lps)) { }
        else if (number % lps == 0 && number % ups == 0) { }
        else if (number % lps != 0 && number % ups != 0) { }
        else
        {
            sum = sum + number;
        }

    }

    Console.WriteLine(sum);
    Console.ReadLine();


}

}