How can I determine if I am running an application from the Visual Studio IDE?

I have written a Winforms application that will function in two ways:

1. If no command line arguments are supplied, the main form of the application will show, and the user开发者_开发问答 can interact with the application.

2. If a command line argument is supplied, the main form is not shown, and the application perfoms the operation defined by the command line argument and then shuts down.

I would also like to display the command line argument to the user in a MessageBox, if the application is run from the Visual Studio IDE and the command line arugment has been specified in the Properties\Debug page.

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You could always use System.Diagnostics.Debugger.IsAttached

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If you need to determine the "parent process" of a given process, here is a link on SO: How to get parent process in .NET in managed way

That being said, what I would do instead is split your program in two: one class library (a DLL, that will contain all the real meat of what your program does) and one EXE that references this class library. This way you can create a 3rd project as a VS Addin that will also reference this class library, but will implicitely be aware that it's running from VS.