<TelerikMultiSelect Data="@MultiSelectData"
                    Value="@MultiSelectValues"
                    TItem="@MultiSelectModel"
                    TValue="@int"
                    ValueChanged="@((List<int> newValues) => OnMultiValueChanged(newValues))"
                    TextField="@nameof(MultiSelectModel.Text)"
                    ValueField="@nameof(MultiSelectModel.Id)"
                    Width="200px" />

@code{
    List<int> MultiSelectValues { get; set; }
    List<MultiSelectModel> MultiSelectData { get; set; }

    async Task OnMultiValueChanged(List<int> newValues)
    {
        if (newValues.Any())
        {
            MultiSelectValues = new List<int>() { newValues.LastOrDefault() };
        }
        else
        {
            MultiSelectValues = new List<int>();
        }
    }

    protected override void OnInitialized()
    {
        MultiSelectData = new List<MultiSelectModel>();

        for (int i = 1; i <= 7; i++)
        {
            MultiSelectData.Add(new MultiSelectModel()
            {
                Id = i,
                Text = "Item " + i
            });
        }

        base.OnInitialized();
    }

    public class MultiSelectModel
    {
        public int Id { get; set; }
        public string Text { get; set; }
    }
}