Question

I received this error:

A first chance exception of type ‘System.ArgumentException’ occurred
in System.Data.Entity.dll

After adding a new property in my entity model.

This occurs after trying to add a new module level object

Private mdbContext As New PFModelContainer

Which then goes to

Public Sub New()
        MyBase.New("name=PFModelContainer", "PFModelContainer")

Where it goes to the error and stops. It worked before I created the property but after I added the property and

generate database model…

from my entity model.

I’ve tried reinstalling VB.NET Express and I’ve tried deleting the designer.vb and deleting edmx.sqlce and then recreating them but that hasn’t helped either.

Any suggestions. I’ve looked on the internet but haven’t found anything useful for this problem. Thanks in advanced!

Answer 1

OK, it turns out that I need to update the tt model by right clicking in the edmx model and pressing

Add Code Generation Item

Then

ADO.NET DbContext Generator

I suppose I did it before but I don’t remember doing it.