How to detect that C# Windows Forms code is executed within Visual Studio?

Question

Is there a variable or a preprocessor constant that allows to know that the code is executed within the context of Visual Studio?

Answer 1

I use this code to distinguish whether it's running in Visual Studio or if it's deployed to customers.

if (ApplicationDeployment.IsNetworkDeployed) {
    // do stuff 
} else {
   // do stuff (within Visual Studio)
}

Works fine for me for ages. I skip some logic when inside Visual Studio (such as logging in to application etc).