@inject TooltipService tooltipService

<RadzenStack Orientation="Orientation.Horizontal" JustifyContent="JustifyContent.Center" Wrap="FlexWrap.Wrap" class="rz-p-12">
    <RadzenButton Text="Left" MouseEnter="@(args => ShowTooltip(args, new TooltipOptions(){ Position = TooltipPosition.Left }))" />
    <RadzenButton Text="Top" MouseEnter="@(args => ShowTooltip(args, new TooltipOptions(){ Position = TooltipPosition.Top }))" />
    <RadzenButton Text="Bottom" MouseEnter="@(args => ShowTooltip(args, new TooltipOptions(){ Position = TooltipPosition.Bottom }))" />
    <RadzenButton Text="Right" MouseEnter="@(args => ShowTooltip(args, new TooltipOptions(){ Position = TooltipPosition.Right }))" />
</RadzenStack>

@code {
    void ShowTooltip(ElementReference elementReference, TooltipOptions options = null) => tooltipService.Open(elementReference, "Some content", options);
}