<TelerikButton Class="tooltip-target" Title="Telerik Tooltip">Button</TelerikButton>

<TelerikDropDownList Data="@ListItems"
                     @bind-Value="@SelectedValue"
                     TextField="@nameof(ListItem.Text)"
                     ValueField="@nameof(ListItem.Id)"
                     AdaptiveMode="@AdaptiveMode.Auto"
                     Width="300px" />
<TelerikTooltip TargetSelector=".tooltip-target"
                ShowOn="@TooltipShowEvent.Hover" />

@code {
    private List<ListItem> ListItems { get; set; } = new();

    private int SelectedValue { get; set; } = 3;

    protected override void OnInitialized()
    {
        ListItems = new List<ListItem>();
        for (int i = 1; i <= 5; i++)
        {
            ListItems.Add(new ListItem()
            {
                Id = i,
                Text = $"Item {i}",
                Category = $"Category {i % 6 + 1}"
            });
        }
        base.OnInitialized();
    }

    public class ListItem
    {
        public int Id { get; set; }
        public string Text { get; set; } = string.Empty;
        public string Category { get; set; } = string.Empty;
    }
}