Get an error System.ArgumentNullException was unhandled, Value Cannot be null. Parameter name: activationContext

Question

I\'m getting the following exception when I try to run up my Winforms app and haven\'t been able to find a solution to it:

System.ArgumentNullException was u         


        

Answer 1

Try Build -> Clean Solution instead. I don't know why this isn't done automatically during a Build, but its no good complaining

Answer 2

try unchecking the Enable clickonce security settings checkbox in the security tab of the application properties(Projects Tab -> "Project Name" Properties-> Security Tab).

Answer 3

Just to give closure on this question the following resolved it:

Unchecked the "enable clickonce security settings" checkbox in the security tab of the application properties.

As suggested by Rene in the comments of my question.

Answer 4

I also had this problem in VS2010 VB.NET, Thanks Rene! Unchecking project_properties.security.enable click once removed my problem

How my symptoms manifested: I had a custom user control on a form, and was forced to remove any reference to it manually inside InitializeComponent() subroutine

reason: my Winform had corrupted just after I modified the New() subroutine of my custom user control, where I changed the New() to add arg's and I didn't create a 'default' Sub New() with no arg's, as required for winform page rendering)