<TelerikGrid
    SelectionMode="@GridSelectionMode.Single"
    TItem="@WarningVM"
    OnRead="@ReadWarnings"
    EditMode="@GridEditMode.Incell"
    OnUpdate="@UpdateHandler"
    OnEdit="@EditHandler"
    OnCreate="@CreateHandler"
    OnCancel="@OnCancelHandler"
    Resizable="true"
    Reorderable="true"
    PageSize="15"
    Navigable="true"
    Pageable="true"
    Sortable="true"
    FilterMode="@GridFilterMode.FilterMenu">
    <GridToolBar>
        <GridCommandButton Command="Add" Icon="add">Add Warning</GridCommandButton>
    </GridToolBar>
     <GridColumns>
        <GridColumn Title=" " Width="4em" Filterable="false">
            <Template>
                <span class="large-icons">
                    <TelerikIcon Icon="info-circle" Class="infoIcon"></TelerikIcon>
                </span>
            </Template>
        </GridColumn>
        <GridColumn Field="@(nameof(WarningVM.Id))" Width="7em" Editable="false"/>
        <GridColumn Field="@(nameof(WarningVM.ValueType))" Title="Value Type"/>
        <GridColumn Field="@(nameof(WarningVM.Value1))" Title="Value #1" />
        <GridColumn Field="@(nameof(WarningVM.Value2))" Title="Value #2" />
        <GridColumn Field="@(nameof(WarningVM.ReasonAdded))" Title="Reason Added"/>
        <GridColumn Field="@(nameof(WarningVM.IsActive))" Title="Active" />
        <GridCommandColumn Width="250px">
                <GridCommandButton Command="Delete" Icon="delete"></GridCommandButton>
            <GridCommandButton Command="Save" Icon="save" ShowInEdit="true"></GridCommandButton>
            <GridCommandButton Command="Cancel" Icon="cancel" ShowInEdit="true"></GridCommandButton>
        </GridCommandColumn>
    </GridColumns>
</TelerikGrid>

public async Task ReadWarnings(GridReadEventArgs args)
{
    ODataWarningsResponse data = await warningService.GetWarnings(args.Request);
    args.Data = data.Warnings;
    args.Total = data.Total;
}
private async Task UpdateHandler(GridCommandEventArgs args)
{
     var test = await warningService.UpdateWarning((WarningVM)args.Item);
}
private async Task EditHandler(GridCommandEventArgs args)
 {
      var warningVM = (WarningVM)args.Item;
      await warningService.UpdateWarning(warningVM);
  }
private void CreateHandler(GridCommandEventArgs args)
{
    WarningVM item = (WarningVM)args.Item;
    warningService.UpdateWarning(item);
}

<TelerikGrid TItem="@MyModel" @ref="_myMainGridReference" OnRead="@OnReadHandler" OnRowDoubleClick="@OnGridDoubleClickHandler">
    <GridColumns>
            - Main grid columns here -
    </GridColumns>
<DetailTemplate>
@{
        /*  Child component inside detailtemplate => how can I reference from the code behind? */
        var ctex = context as JobViewModel;
        <TelerikGrid @ref="??????" Data="@ctex.data" SelectionMode="@GridSelectionMode.Multiple">
               <GridColumns>
                       - Detail grid columns here -
               </GridColumns>
        </TelerikGrid>
}
    </DetailTemplate>
</TelerikGrid>