// Own partial of the generated context of the entity framework.
public partial class PrimaryDatastoreContext : IManagedContext
{
    // Implements the disposing event like it is defined in the interface IManagedContext.
    public event EventHandler Disposing = delegate { };

    // Called on disposing the context.
    protected override void Dispose(Boolean disposing)
    {
        base.Dispose(disposing);

        // Raise the event to dispose the context
        Disposing(this, new EventArgs());
    }
}