using System.Threading.Tasks; namespace WeApp.CommonManager.AttachFiles { public sealed class NullAttachFileManager : IAttachFileManager { public static NullAttachFileManager Instance { get; } = new NullAttachFileManager(); public Task FileUpload(AttachFileCreateDto input) { return Task.CompletedTask; } public Task FileUpload(string fileInfo, string filePath, string fileName, string fileExt) { return Task.CompletedTask; } } }