.cs

using (var client = new HttpClient(HttpClientHandler))
                {
                    client.DefaultRequestHeaders.Add("clientId", ClientId);
                    client.DefaultRequestHeaders.Add("accessToken", AccessToken);
                    client.BaseAddress = UriBase;

                    HttpRequestMessage request = new HttpRequestMessage(
                                                        HttpMethod.Delete, 
                                                        $"holmes/api/document/{Id}"
                                                     );
                    request.Headers.Clear();
                    request.Headers.TryAddWithoutValidation("Content-Type", "application/x-www-form-urlencoded");

                    var resp = await client.SendAsync(request);
                    if (resp.IsSuccessStatusCode)
                    {
                        var conteudo = await resp.Content?.ReadAsStringAsync();
                    }
                    else
                    {
                        var conteudo = await resp.Content?.ReadAsStringAsync();
                        Console.WriteLine(conteudo);
                    }
                }