Determine smallest single-digit factor with for loop in CSharp

using System; /*from w  w w. jav  a  2 s  .  c  om*/
 
public class MainClass {    
  public static void Main() {    
    int num; 
 
    for(num = 2; num < 12; num++) { 
      if((num % 2) == 0) 
        Console.WriteLine("Smallest factor of " + num + " is 2.");  
      else if((num % 3) == 0)  
        Console.WriteLine("Smallest factor of " + num + " is 3.");  
      else if((num % 5) == 0) 
        Console.WriteLine("Smallest factor of " + num + " is 5.");  
      else if((num % 7) == 0)  
        Console.WriteLine("Smallest factor of " + num + " is 7.");  
      else  
        Console.WriteLine(num + " is not divisible by 2, 3, 5, or 7.");  
    } 
  } 
}