[Solved] GridCommandColumn GridCommandButton text for add/edit

<TelerikGrid OnAdd="@OnGridAdd"
                    OnEdit="@OnGridEdit">
    <GridColumns>
        <GridCommandColumn>
            <GridCommandButton Command="Save" ShowInEdit="true">@SaveButtonText</GridCommandButton>
        </GridCommandColumn>
    </GridColumns>
</TelerikGrid>

@code {
    private string SaveButtonText { get; set; } = "Save"; // practically never used

    private void OnGridAdd(GridCommandEventArgs args)
    {
        SaveButtonText = "Add";
    }

    private void OnGridEdit(GridCommandEventArgs args)
    {
        SaveButtonText = "Update";
    }
}