Question from the C# - Fundamentals test

What does the following code return in display:

static void Main(string[] args) { 		  	  	 		 	   
            int a = 10; int b= 15; 		  	  	 		 	 	 	   
            int temp = 2*a; 		  	  	 		 	 	 	  
            a = b; 		  	  	 		 	 	 	  
            b = temp; 		  	  	 		 	 	 	  
            Console.WriteLine("a = "+a +" "+ "b = "+b);
 }