SSO 406 error C#

Having a issues with getting the token with the code the response body is empty the status code i get is 406 any ideas? this is a blazer app in c#

@page “/CallBack”
@using System.Linq;
@using System.Net.Http;
@using System.Net.Http.Headers;
@using System.Text;
@using System.Threading.Tasks;
@using Microsoft.AspNetCore.Components;
@using Microsoft.Extensions.Configuration;
@using System.Text.Json;
@using eveFastResponseFleet.Data;
@inject IConfiguration Configuration
@inject NavigationManager navManager


@@foreach (var item in Token)


@code {
private static readonly HttpClient _httpClient = new HttpClient();
private EveSSO Token;
string code { get; set; }
private static HttpClient _client = new HttpClient()
protected override async Task OnInitializedAsync()
var uri = navManager.ToAbsoluteUri(navManager.Uri);
if (Microsoft.AspNetCore.WebUtilities.QueryHelpers.ParseQuery(uri.Query).TryGetValue(“code”, out var param))
code = param.First();
byte toBytes = Encoding.ASCII.GetBytes(Configuration[“EsiConfig:ClientId”] + “:” + Configuration[“EsiConfig:SecretKey”]);
string base64 = System.Convert.ToBase64String(toBytes);
var dict = new Dictionary<string, string>();
dict.Add(“grant_type”, “authorization_code”);
dict.Add(“code”, code);
_httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue(“Basic”, base64);
_httpClient.DefaultRequestHeaders.Host = “”;
_httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(“application/x-www-form-urlencoded”));
string body = “grant_type=authorization_code&code=”+code;
var requestMessage = new HttpRequestMessage()
Method = new HttpMethod(“POST”),
RequestUri = new Uri(“”),
Content = new FormUrlEncodedContent(dict)
var response = await _httpClient.SendAsync(requestMessage);
var responseStatusCode = response.StatusCode;
var responseBody = await response.Content.ReadAsStringAsync();
Token = JsonSerializer.Deserialize<EveSSO>(responseBody);

Seems you’re missing the Content-Type: application/x-www-form-urlencoded header. See for docs on the full flow.

this line should fulfill the requirement but if i remove that line it works so thank you for putting my on the right path

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