c# - Can't use System.Windows.Forms -

i have tried making (my first) c# program:

using system; using system.collections.generic; using system.linq; using system.text;  namespace consoleapplication1 {     class program     {         static void main(string[] args)         {             console.writeline("hello");             console.readline();         }     } } 

this goes well, if try using system.windows.forms:

using system; using system.collections.generic; using system.linq; using system.text; using system.windows.forms;  namespace consoleapplication1 {     class program     {         static void main(string[] args)         {             console.writeline("hello");             system.messagebox("hello");             console.readline();         }     } } 

this error get:

error   1   type or namespace name 'windows' not exist in namespace     'system' (are missing assembly reference?)  c:\users\ramy\documents\visual studio 2010\projects\consoleapplication1\consoleapplication1\program.cs  5   14  consoleapplication1 

some details: - using visual studio 2012; - have installed .net development kit; - console application.

maybe it's because on console application can't use system.windows.forms? if so, program should be? have tried form, displaying window , no code.

a console application not automatically add reference system.windows.forms.dll.

right-click project in solution explorer , select add reference... , find system.windows.forms , add it.