Basic soap call

SoapSnippet.cs

var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", "<token>");
var xml = "<xml>";
var soapAction = "<soap-action>";
var httpContent = new StringContent(xml, Encoding.UTF8, "text/xml");
var request = new HttpRequestMessage(new HttpMethod("POST"), url)
{
    Content = httpContent
};
request.Headers.Add("SOAPAction", soapAction);
var response = await client.SendAsync(httpContent);