Below code helps us to get element in array is multiple of 3 or not if it is value return is true else false
 
 static void Main(string[] args)
 {
     //below is the array contains elements    
     int[] arrayno = { 12, 33, 24, 90, 99, 42, 75 };
     bool CheckMultiple = CheckElement(arrayno, 3);
 }
 
 //function which return either true or false
 private static bool CheckElement(int[] arrayno, int divisor)
 {    
     bool CheckMultiple = arrayno.All(number => number % divisor == 0);        
     return CheckMultiple;
 } |  |