<TelerikGrid @ref="SearchGrid"
                 TItem="@ChargeUIResult"
                 Pageable="true"
                 Sortable="true"
                 ConfirmDelete="true"
                 Resizable="true"
                 Groupable="false"
                 Navigable="false"
                 Reorderable="true"
                 EnableLoaderContainer="false"
                 FilterMode="GridFilterMode.None"
                 EditMode="GridEditMode.Popup"
                 SelectionMode="GridSelectionMode.Multiple"
                 ShowColumnMenu="true"
                 OnRead="@ReadItems"
                 OnRowClick="@OnRowClickHandler"
                 SelectedItemsChanged="@((IEnumerable<ChargeUIResult> args) => SetSelectedItem(args))"
                 SelectedItems="@SearchState.SelectedItems"
                 PageChanged="@SearchState.ClearingSelectedItem"
                  ......>
        <GridSettings>
            <GridPagerSettings InputType=PagerInputType.Buttons PageSizes="@SearchState.PageSizes" ButtonCount="@SearchState.PageButtonCount" />
            <GridColumnMenuSettings Sortable="true"
                                    Lockable="false"
                                    FilterMode="@ColumnMenuFilterMode.None" />
        </GridSettings>
  </TelerikGrid>

Code:
    private async Task SetSelectedItem(IEnumerable<ChargeUIResult> args)
    {
        if (ShouldRenderSelected)
        {
            var selectedList = args.ToList();             
            SearchState.SetSelectedItems(selectedList);
            StateHasChanged();
        }
        ShouldRenderSelected = true;
    }

<TelerikComboBox Data="LookupDropdown" @bind-Value="@Compare.Operand2.Value" TextField="@nameof(KeyValueDropdownsModel.Label)"
                 ValueField="@nameof(KeyValueDropdownsModel.Action)" Filterable="true" AllowCustom=IsEnabled
                 Placeholder=@PlaceholderContent FilterOperator="@FilterOperator" Width="270px" OnRead="LoadDropdownDataAsync">
    <ItemTemplate>
        <span class="selectedOptionCode" aria-label="@context.Label" title="@context.Description">@context.Label</span>
    </ItemTemplate>
    <HeaderTemplate>
        @if (IsLoading || isEOBCodeLoading)
        {
            <div class="dropdown-spinner">
                <TelerikLoader Type="@LoaderType.InfiniteSpinner" Size="@(ThemeConstants.Loader.Size.Small)"></TelerikLoader>
            </div>
        }
    </HeaderTemplate>

    <NoDataTemplate>
        @if (!IsLoading && !isEOBCodeLoading)
        {
            <div>No data available</div>
        }
    </NoDataTemplate>
    <ComboBoxSettings>
        <ComboBoxPopupSettings Height="auto" MinHeight="30px" MaxHeight="250px" />
    </ComboBoxSettings>
</TelerikComboBox>

<DiagramShapes>
    @foreach (Node node in Nodes)
    {
        <DiagramShape Id="@node.LinkID" >
            <DiagramShapeContent Text="@node.GetDisplayName()" />
            <DiagramShapeFill Color="@node.GetColor()"/>
        </DiagramShape>
    }
</DiagramShapes>

async Task OnPersonClick(DiagramShapeClickEventArgs Args)
{
    foreach (Node node in Nodes)
    {
        if (node.LinkID.Equals(Args.Id))
            node.State = SelectedState.True;
        else
            node.State = SelectedState.False;
    }
}

<TelerikWindow Visible=true>
    <WindowContent>
            <TelerikTreeView Data="@TreeData">
                <TreeViewBindings>
                    <TreeViewBinding>
                        <ItemTemplate>
                            @{
                                TreeItem itm = context as TreeItem;
                                <span @onclick="@( _ => NodeClick(itm) )">
                                    Node:
                                    <strong>@itm.Text</strong>
                                </span>
                            }
                        </ItemTemplate>
                    </TreeViewBinding>
                </TreeViewBindings>
            </TelerikTreeView>
    </WindowContent>
</TelerikWindow>

@code {
    string result { get; set; }
    async Task NodeClick(TreeItem clickeNode)
    {
        result = $"Last clicked node Id: {clickeNode.Id}";
    }

    // sample data

    public IEnumerable<TreeItem> TreeData { get; set; }

    public class TreeItem
    {
        public string Text { get; set; }
        public int Id { get; set; }
        public List<TreeItem> Items { get; set; } = new List<TreeItem>();
        public bool HasChildren { get; set; }
    }

    protected override void OnInitialized()
    {
        LoadHierarchical();
    }

    private void LoadHierarchical()
    {
        List<TreeItem> roots = new List<TreeItem>() {
            new TreeItem { Text = "Item 1", Id = 1, HasChildren = true },
            new TreeItem { Text = "Item 2", Id = 2, HasChildren = true }
        };

        roots[0].Items.Add(new TreeItem
        {
            Text = "Item 1 first child",
            Id = 3

        });

        roots[0].Items.Add(new TreeItem
        {
            Text = "Item 1 second child",
            Id = 4

        });

        roots[1].Items.Add(new TreeItem
        {
            Text = "Item 2 first child",
            Id = 5

        });

        roots[1].Items.Add(new TreeItem
        {
            Text = "Item 2 second child",
            Id = 6

        });

        TreeData = roots;
    }
}