FluentTerminal/FluentTerminal.SystemTray/Services/UpdateService.cs

using Newtonsoft.Json;
using RestSharp;
using System;
using Windows.ApplicationModel;

namespace FluentTerminal.SystemTray.Services
{
    public class UpdateService
    {
        private const string apiEndpoint = "https://api.github.com";

        public bool IsNewerVersionAvailable()
        {
            var restClient = new RestClient(apiEndpoint);
            var restRequest = new RestRequest("/repos/felixse/fluentterminal/releases", Method.GET);

            var restResponse = restClient.Execute(restRequest);
            if (restResponse.IsSuccessful)
            {
                dynamic restResponseData = JsonConvert.DeserializeObject(restResponse.Content);
                string tag = restResponseData[0].tag_name;
                var latestVersion = new Version(tag);
                var currentVersion = Package.Current.Id.Version;
                return latestVersion > new Version(currentVersion.Major, currentVersion.Minor, currentVersion.Build, currentVersion.Revision);
            }
            return false;
        }
    }
}