如何在 .net 内核上为 winforms 中的嵌入式资源制作提取 function？

Question

抱歉，标题太长了，但我有问题。 When I make an Extract function for embedded resources in winforms on .net framework, it works properly, but exactly same function on .net core doesn't work. 为什么？ 这个 function：

        public static void Extract(string nameSpace, string outDirectory, string internalFilePath, string resourceName)
        {
            Assembly assembly = Assembly.GetCallingAssembly();
         // winforms .net core shows here green wavy line on "assembly.GetManifestResourceStream(nameSpace + "." + (internalFilePath == "" ? "" : internalFilePath + ".") + resourceName))"
            using (Stream s = assembly.GetManifestResourceStream(nameSpace + "." + (internalFilePath == "" ? "" : internalFilePath + ".") + resourceName))
         // and here too on "(s)"
            using (BinaryReader r = new BinaryReader(s))
            using (FileStream fs = new FileStream(outDirectory + "\\" + resourceName, FileMode.OpenOrCreate))
            using (BinaryWriter w = new BinaryWriter(fs))
            w.Write(r.ReadBytes((int)s.Length));
        }