public void ExampleAddNew()
{
    using (DatabaseApp dbApp = new DatabaseApp())
    {
        // NewACObject() creates a new Entity-Object an inializes all Properties with Default-Values, 
        // defined in iPlus development environment
        var newMat = Material.NewACObject(dbApp, null);
        newMat.MaterialNo = "123456";
        newMat.MaterialName1 = "ExampleAddNew";
        dbApp.Material.Add(newMat);
        MsgWithDetails msg = dbApp.ACSaveChanges();
        if (msg != null)
        {
            Messages.LogError(GetACUrl(), "ExampleAddNew(10)", msg.DetailsAsText);
            dbApp.ACUndoChanges();
        }
    }
}