How to create an in-memory icon for my unit test

I have a resource assembly that contains various strings, icons, and bitmaps that my application uses.

I have written a Resource Manager class that I would like to unit test. I have managed to create unit tests that have in-memory strings (duh) and bitmaps but I am struggling with how to handle the icon resources.

Bitmaps can be easily created with just a height and width params but Icons seem to require a valid stream.

I've tried:

Icon icon = new Icon(new MemoryStream(), new Size(10, 15));

But this gives me the error "Argument 'picture' must be a picture that can be used as an icon".

Obviously I'm trying to write unit tests so want to avoid having to load a real i开发者_开发知识库con from the file system. Also the ResourceManager class is dealing with embedded resources within an assembly so I don't want to embed a real icon within my unit test assembly otherwise I'll be using similar code to facilitate the test which seems counter intuitive.

Any ideas?

Cheers, Ben

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Why not just use one of the standard system icons? Like

Icon icon = System.Drawing.SystemIcons.WinLogo;