MessageBox in C#

Hi
I am a C++ programmer but am having to do a small app in C#
I want to display a Message Box so wrote

Code:

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MessageBox.Show("The diagram already exists - Do you want to overrite?", "Diagram Exists",
        MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

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But the compiler says
C:\VSProjects\Addin2\Class1.cs(180,29): error CS0103: The name 'MessageBox' does not exist in the current context

How can I fix this?

Graham

Make sure System.Windows.Forms is referenced.

Btw SomersetBoy, in Visual Studio you can right click on Types that you know should be right, but aren't scopped, and go to Resolve->Include namespace. It will automatically add the namespace using for you, or explicitly scope the Type in question.

Quote:

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Originally Posted by mariocatch

Btw SomersetBoy, in Visual Studio you can right click on Types that you know should be right, but aren't scopped, and go to Resolve->Include namespace. It will automatically add the namespace using for you, or explicitly scope the Type in question.

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That's indeed a nice feature in VS, but will only work if the type is referenced.

Stress that assembly System.Windows.Forms.dll is meant, because the namespace name is the same, but you haven't access to the namespace until you reference the assembly.

Quote:

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Originally Posted by dannystommen

That's indeed a nice feature in VS, but will only work if the type is referenced.

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Yep, but that's where Msdn comes into play:

Quote:

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MessageBox Class

Displays a message box that can contain text, buttons, and symbols that inform and instruct the user.



Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)

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