entity-frameworkdbset

C# | Entity Framework | An item cannot be removed from a fixed size Array of type

In EF, I tried adding a record using syntax:

Context.Set<TABLENAME>().Add(TABLEROW)

I get this crazy error: "An item cannot be removed from a fixed size Array of type"

I did a bit of goggling and it suggests I change from DBSet to List from the generated context file of:

public partial class GeniusDBContext : DbContext
{
    public virtual DbSet<TABLENAME> TABLENAMES { get; set; }
    ...
}

to 

public partial class GeniusDBContext : DbContext
{
    public virtual List<TABLENAME> TABLENAMES { get; set; }
    ...
}

This is ridiculous because if you change the .edmx file, you will lose these changes. Is there another way around this?

Solution

  • DbSet<> is correct, there is no need to change it to List<>. I think the suggestion found has been be misleading and was not the problem.

    To add a new entity, try this:

    var ctx = new GeniusDBContext();

var entity = new MyEntity();
ctx.MyEntities.Add(entity);