Попробуй это
static HttpClient newclient = new HttpClient();
public static async Task Main(string[] args)
{
string url = "
https://test/test/test";
string sinceDateTimeUtc = "2020-01-01T00:00:00.000";
string tillDateTimeUtc = "2022-12-11T00:00:00.000";
string Authorization = "bfskjdnflsanlk12fns";
var data = new Dictionary();
data["sinceDateTimeUtc"] = sinceDateTimeUtc;
data["tillDateTimeUtc"] = tillDateTimeUtc;
string result;
using (HttpRequestMessage requestMessage = new HttpRequestMessage(HttpMethod.Get, url))
{
requestMessage.Headers.Add("Content-Type", "application/json");
requestMessage.Headers.Add("Accept", "application/json");
requestMessage.Headers.Add("Authorization", Authorization);
var response = await newclient.SendAsync(requestMessage);
result = await response.Content.ReadAsStringAsync();
};
System.Console.WriteLine(result);
}