<div class="rz-p-12 rz-text-align-center">
    <RadzenSelectBar @bind-Value=@values TValue="IEnumerable<int>" Multiple="true">
        <Items>
            <RadzenSelectBarItem Text="Orders" Value="1" />
            <RadzenSelectBarItem Text="Employees" Value="2" />
            <RadzenSelectBarItem Text="Customers" Value="3" />
        </Items>
    </RadzenSelectBar>
</div>

@code {
    IEnumerable<int> values = new int[] { 1, 2 };
}