Crosspost.cs

using Reddit;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            var reddit = new RedditClient("YourRedditAppID", "YourBotUserRefreshToken");

            // Since we only need the posts, there's no need to call .About() on this one.  --Kris
            var news = reddit.Subreddit("news");

            /*
             * If you call GetTop() directly, the last "t" value you passed will be used for the .Top property.
             * Remember that the .Top property is automatically cached with the results of GetTop(), so we're 
             * only doing one API query for the posts retrieval part.
             * 
             * --Kris
             */
            if (news.Posts.GetTop(t: "day")[0].Listing.IsSelf)
            {
                var newSelfPost = news.SelfPost(news.Posts.Top[0].Fullname).About().XPostTo("MySub");
            }
            else
            {
                var newLinkPost = news.LinkPost(news.Posts.Top[0].Fullname).About().XPostTo("MySub");
            }
        }
    }
}