Entity Framework Code First Optional Property is mapped as Required

Question

I have an issue with Code First. I just migrate the project from Model First to Code First and I think that Entity Framework is losing its mind... Here is my class (simplified) :

public class MyClass
{
    // Key, other properties...

    public bool? MyNullBoolean { get; set; }

    public static void Configure(EntityTypeConfiguration<MyClass> myClass)
    {
        // Other configuration on other properties...
        myClass.Property(m => m.MyNullBoolean).IsOptional();
    }
}

Here are some additionnal informations for you :

• I call the Configure() method in the OnModelCreating() method.
• Migrations are enabled and Automatic mode is set to false
• In my migration I have MyNullBoolean = c.Boolean(nullable: false) , so EF is acting like this property is required, wich is not as previously seen.
• I target an existing DB (dev) with data inside so I can't perform Migration "for testing purposes"
• This is the exact same model as the one from Model First and that last one is working correctly...

Here is what I tried :

• Disabling / Enabling EF on the project (deleting Migrations in project and db)
• Restarting VS
• Targeting another DB (same structure)
• Leave the property unconfigured (so EF do the job alone)

I'm out of idea and I found nothing in the Internet. Thanks for your help guys !

Answer 1

I think that EF was corrupted because when I uninstall it, clean the solution, install it, rebuild the solution, it worked.

So there was no problem with db or my model.