c# modifying resource file in a pre-built application

I have a win forms application written in C# which has a re开发者_如何学Pythonsource file, after this application has been built I want to alter the contents of the resource file, how would I go about doing this?

I've realised that I was doing this the wrong way around, instead of building an application and then attempting to modify the resources of that application on the fly I am not creating and building an application (including resources) on the fly and this seems to work perfectly for my purposes.