Can i Obfuscate a Visual C++ Windows Forms Application?

Hello, can i Obfuscate a Visual C++ Windows Forms Application?
I have tried to make a new project and open my
Visual C++ Windows Forms Application then it gives me
http://i.imgur.com/Fin15.png
"Is not a valid .NET assembly."
How can i fix this?
Thank you guys!
And sorry for my English.
I have tried to make a new project and open my
Visual C++ Windows Forms Application then it gives me
http://i.imgur.com/Fin15.png
"Is not a valid .NET assembly."
How can i fix this?
Thank you guys!

And sorry for my English.