c# - How to put a MessageBox to display my Fibonacci sequence vertically -

here's finished code, need little advice , how insert desired messagebox. needs display finished sequence vertically, thanks.

using system; using system.collections.generic; using system.linq; using system.text; using system.windows.forms;  class program { public static double fibonacci(double n) {     double = 0;     double b = 1;      (double = 0; < n; i++)     {         double sum = a;         = b;         b = sum + b;     }     return a;     }  static void main() {     (double = 0; < 12; i++)     {         console.writeline(fibonacci(i));      }   } } 

if want show messagebox, try:

static void main() {     list<double> nums = new list<double>();     (double = 0; < 12; i++)     {         nums.add(fibonacci(i));     }      messagebox.show(string.join(system.environment.newline, nums)); } 

a console application can display messagebox if you've included right libraries, , looks include system.windows.forms, should set.

although honestly, method isn't efficient, everytime call it, has recalculate numbers term want. use yield return, main can 1 liner:

class program {     public static ienumerable<long> fibonacci(int n)     {         long = 0;         long b = 1;          (int = 0; < n; i++)         {             yield return a;              long sum = a;             = b;             b = sum + b;         }     }      static void main()     {         messagebox.show(string.join(system.environment.newline, fibonacci(12)));     } }