How do i find if a positive integer is prime or not? [closed]

Question

Am very new to the C# language and i have been working on this program to find a positive integer is a prime or not. what am i doing wrong and how do i accomplish that. thank you in advance

 static void Main(string[] args) 
{ 
    if (FindPrime(47)) 
    { 
        Console.WriteLine("Prime"); 
    } 
    else 
    { 
        Console.WriteLine("Not Prime"); 
    } 
    Console.readLine(); 
}   
internal static bool FindPrime(int number) 
{ 
    if (number == 1) return false; 
    if (number == 2) return true; 
    if (number % 2 != 0) return false; 
     Var SquareRoot = (int)Math.Floor(Math.Sqrt(number)); 
     for (int i = 3; i <= squareRoot; i += 2) 
    { 
        if (number % i == 0) return false; 
    } 
     return true; 
}