GUTSchedule/GUT.Schedule/GUTSchedule/Extensions.cs

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

namespace GUTSchedule
{
	public static class Extensions
	{
		public static void SetContent(this HttpRequestMessage request, params (string key, string value)[] values)
		{
			if (request == null)
				throw new ArgumentNullException(nameof(request));

			Dictionary<string, string> body = new Dictionary<string, string>();
			foreach ((string key, string value) in values)
				body.Add(key, value);
			request.Content = new FormUrlEncodedContent(body);
		}
		public static async Task<string> GetString(this HttpResponseMessage response)
		{
			if (response == null)
				throw new ArgumentNullException(nameof(response));

			Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
			return Encoding.GetEncoding("Windows-1251").GetString(await response.Content.ReadAsByteArrayAsync().ConfigureAwait(false));
		}
	}
}