2chBackAPI/BufferControllers/BufferFill.cs

using NeDvachAPI.DBControllers;
using NeDvachAPI.Models;

namespace NeDvachAPI.BufferControllers
{
    public class BufferFill
    {

        public static bool FillBuffer(string board) //method to get buffer of information, which is being ran while API is started
        {
            List<Post> posts = DBchat.ThreadsList(board);
            APIThreadBuffer.WriteThreadPreviewsBuffer(posts);
            Console.WriteLine("Заполняю буфер оп-постами");

            for (int threadId = 1; threadId <= posts.Count; threadId++)
            {
                APIThreadBuffer.WriteThreadsBuffer(DBchat.PostsList(board, threadId));                
            }
            Console.WriteLine($@"Буферизую треды с {1} по {posts.Count}.");
            return true;
        }
    }
}