When using HttpClient.SendAsync() to access a resource that might take a while to process it can be advantageous to detect when the connection has been disconnected.

This can be done using a CancellationToken passed to the HttpClient.SendAsync() method.

public class HttpRequestHandler : IHttpRequestHandler
{
    public CancellationToken CancellationToken => _cancel;

    public HttpRequestHandler(IHttpContextAccessor httpContext)
    {
        _cancel = httpContext?.HttpContext?.RequestAborted ?? CancellationToken.None;
    }

     /// <summary>
    /// Execute request and return response.
    /// </summary>
    public virtual async Task<IResponse<T>> ExecuteAsync<T>(IRequest request) where T : class, new()
    {
        // ...
        var response = await this.GetClient(request).SendAsync(request1, completionOption, CancellationToken).ConfigureAwait(false);
        // ...
    }
}