Driver method
public static void Main ( string [ ] args ) { Point A = new Point ( 1 , 1 ) ; Point B = new Point ( 4 , 4 ) ; Point C = new Point ( 1 , 8 ) ; Point D = new Point ( 2 , 4 ) ; Point intersection = lineLineIntersection ( A , B , C , D ) ; if ( intersection . x == double . MaxValue && intersection . y == double . MaxValue ) { Console . WriteLine ( " The ▁ given ▁ lines ▁ AB ▁ and ▁ CD ▁ are ▁ parallel . " ) ; } else {