FSO.Content.ChangeManager.SaveChange C# (CSharp) Method

        public void SaveChange(IffFile file)
        {
            lock (this)
            {
                if (file.RuntimeInfo.State == IffRuntimeState.Standalone)
                {
                    //just save out iff
                    var filename = file.RuntimeInfo.Path;
                    Directory.CreateDirectory(Path.GetDirectoryName(filename));
                    using (var stream = new FileStream(filename, FileMode.Create))
                        file.Write(stream);

                    foreach (var chunk in file.ListAll())
                    {
                        chunk.RuntimeInfo = ChunkRuntimeState.Normal;
                    }
                }
                else
                {
                    string dest = Path.Combine(FSOEnvironment.ContentDir, ((file.RuntimeInfo.State == IffRuntimeState.PIFFClone) ? "Objects/" : "Patch/User/"));
                    Directory.CreateDirectory(dest);
                    if (file.RuntimeInfo.State == IffRuntimeState.ReadOnly)
                    {
                        file.RuntimeInfo.State = IffRuntimeState.PIFFPatch;
                    }

                    var stringResources = new HashSet<Type> { typeof(STR), typeof(CTSS), typeof(TTAs) };
                    var sprites = (file.RuntimeInfo.UseCase == IffUseCase.ObjectSprites);
                    file.RuntimeInfo.Patches.Clear();

                    var piff = FSO.Files.Formats.PiffEncoder.GeneratePiff(file, null, stringResources);

                    string name = file.Filename.Substring(0, file.Filename.Length - 4); //get without extension

                    if (piff != null)
                    {
                        var filename = dest + name + (sprites ? ".spf" : "") + ".piff";
                        using (var stream = new FileStream(filename, FileMode.Create)) piff.Write(stream);
                        file.RuntimeInfo.Patches.Add(piff);
                    }

                    if (!sprites)
                    {
                        piff = FSO.Files.Formats.PiffEncoder.GeneratePiff(file, stringResources, null);
                        if (piff != null)
                        {
                            var filename = dest + name + ".str.piff";
                            using (var stream = new FileStream(filename, FileMode.Create)) piff.Write(stream);
                            file.RuntimeInfo.Patches.Add(piff);
                        }
                    }
                }

                file.RuntimeInfo.Dirty = false;
                ChangedFiles.Remove(file);
            }
        }