public ValueTask<IReadOnlyList<TElement>> GetAllAsync(
    CancellationToken cancellationToken = default(CancellationToken)
)

<DxRichEdit @ref="richEdit" />
@code {
    DxRichEdit richEdit;
    Document documentAPI;
    @* ... *@
    /* 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 {
            documentAPI = richEdit.DocumentAPI;
            @* ... *@
            // Gets URLs of all hyperlinks in the document
            List<string> hyperlinkUrls = new List<string>();
            var hyperlinks = await documentAPI.Hyperlinks.GetAllAsync();
            for (int i = 0; i < hyperlinks.Count; i++) {
                var hLink = await documentAPI.Hyperlinks.GetAsync(i);
                if (hLink.Url != "")
                    hyperlinkUrls.Add(hLink.Url);
            }
            @* ... *@
        }
        catch (OperationCanceledException e) {
            Console.WriteLine($"{nameof(OperationCanceledException)} thrown with message: {e.Message}");
        }
}