Can t use System Windows Forms

Question

I have tried making  my first  a 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  but if I 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 is the error I get   Error   1   The type or namespace name  Windows  does not exist in the namespace      System   are you missing an assembly reference    C  Users Ramy Documents Visual Studio 2010 Projects ConsoleApplication1 ConsoleApplication1 Program cs  5   14  ConsoleApplication1   Some details  - I am using Visual Studio 2012  - I have installed the  NET Development Kit  - It is a Console Application   Maybe it s because on a Console Application can t use System Windows Forms  If so  what program should be  I also have tried with a form  but I was only displaying a window and no code

User · Answer

Ensure Solution Explorer is visible In MS Studio 2008 Go to view and click Solution explorer

In Solution explorer go to Reference Right click on Reference and select Add Reference.. Select .NET tab Scroll down till you find System.Drawing -> select it -> click on OK button Do the same for System.Windows.Forms

When you run your form this will work

(eddie lives somewhere in time)

User · Answer

just add reference to System Windows Forms dll

User · Answer

Adding System Windows Forms reference requires  NET Framework project type  I was using  NET Core project type  This project type doesn t allow us to add assemblies into its project references  I had to move to  NET Framework project type before adding System Windows Forms assembly to my references as described in Kendall Frey answer  Note  There is reference System Windows Forms available under COM tab  for both  NET Core and  NET Framework   It is not the right one  It has to be System Windows Forms under Assemblies tab

User · Answer

To add the reference to  System Windows Forms   it seems to be a little different for Visual Studio Community 2017   1   Go to solution explorer and select references    2   Right-click and select Add references   3   In Assemblies  check System Windows Forms  and press ok    4  That s it

User · Answer

A console application does not automatically add a reference to System Windows Forms dll   Right-click your project in Solution Explorer and select Add reference    and then find System Windows Forms and add it

User · Answer

go to the side project panel  right click on references -  add reference and find System Windows Forms  Any time some error like this occurs  some namespace you added is missing that is obviously there  the solution is probably this - adding a reference   This is needed because your default project does not include everything because you probably wont need it so it saves space  A good practice is to exclude things you re not using

User · Answer

You have to add the reference of the namespace   System Windows Forms to your project  because for some reason it is not already added  so you can add New Reference from Visual Studio menu   Right click on  Reference     Add New Reference     System Windows Forms

User · Answer

may be necesssary   unreference system windows forms  and reference again

[c#] Can't use System.Windows.Forms

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