<ErrorBoundary>
    <ChildContent>
        @Body
    </ChildContent>
    <ErrorContent>
        <p class="error">An unhandled error has occurred.</p>
    </ErrorContent>
</ErrorBoundary>

<TelerikDropDownList 
    Data="@DropDownData"                  
    ValueChanged="@( (int newValue) => OnDropDownValueChanged(newValue))"       
    TextField="@nameof(TestItem.Name)"
    ValueField="@nameof(TestItem.Id)" />

<TelerikButton OnClick="@(() => throw new Exception("Exception from button"))">Click to test ErrorBoundary</TelerikButton>

@code {
    private int? SelectedDropDownValue;

    private List<TestItem> DropDownData = new()
    {
        new() { Id = 1, Name = "Select me to throw exception" },
    };

    private async Task OnDropDownValueChanged(int newValue)
    {
        throw new InvalidOperationException("This exception should be caught by the ErrorBoundary!");
    }

    public class TestItem
    {
        public int Id { get; set; }
        public string Name { get; set; } = string.Empty;
    }
}