Driver Code
public static void Main ( String [ ] args ) { int [ ] arrA = { 2 , 4 , 6 , 8 , 10 , 12 , 13 } ; int [ ] arrB = { 2 , 4 , 6 , 8 , 10 , 12 } ; Console . WriteLine ( find_extra_element_index ( arrA , arrB ) ) ; } }