Check the Number is Prime or Not

Question

Please Check the following code i am facing an error in this code below

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Prime2

{

class CheckPrime

{

//Return true If x is Prime

#region IsPrimebooleanLogic

public bool IsPrime(int x)

{

for (int i = 2; i <= x / i; i++)

{

if ((x % i) == 0)

{

return false;

}

else

return true;

}

}

#endregion

}

class CheckPrimeDemo

{

static void Main(string[] args)

{

CheckPrime opt = new CheckPrime();

 int end;

Console.WriteLine("Enter the Ending Number for Prime number search");

end = int.Parse(Console.ReadLine());

for (int i = 1; i < 10; i++)

{

if (opt.IsPrime(i))

Console.WriteLine(i+ " is Prime Number");

else

Console.WriteLine(i + " is Not Prime Number");

}

}

}

}