public ValueTask RemoveAsync(
    Bookmark bookmark,
    CancellationToken cancellationToken = default(CancellationToken)
)

<DxRichEdit @ref="@richEdit" />

@code {
    DxRichEdit richEdit { get; set; }
    /* Surround the code that contains an asynchronous operation with a try-catch block to handle
    the OperationCanceledException. This exception is thrown when an asynchronous operation is canceled. */
        try {
            var firstBookmark = await richEdit.DocumentAPI.Bookmarks.GetAsync(0);
            // Remove the first bookmark
            await richEdit.DocumentAPI.Bookmarks.RemoveAsync(firstBookmark);
        }
        catch (OperationCanceledException e) {
            Console.WriteLine($"{nameof(OperationCanceledException)} thrown with message: {e.Message}");
        }
}