Program.cs

using DontPanic.TumblrSharp;
using DontPanic.TumblrSharp.Client;
using System;

namespace MyCoolBot
{
    class Program
    {
        static void Main(string[] args)
        {
            var inbox = Tumblr.Client.GetSubmissionPostsAsync(Tumblr.BlogName).Result;

            foreach (var message in inbox)
            {
                var msg = (AnswerPost)message;

                Tumblr.Client.EditPostAsync(
                    Tumblr.BlogName, msg.Id, PostData.CreateAnswer(
                        "hello", null, PostCreationState.Published));
            }

            Console.ReadLine();
        }


    }
}