using System; using System.Collections.Generic; namespace Notes; public interface IFileService { string Combine(string args0, string args1); string GetRandomFileName(); IEnumerable EnumerateFiles(string path, string patten); string GetFileName(string filename); string ReadAllText(string filename); DateTime GetLastWriteTime(string filename); bool ExistsFile(string filename); void Delete(string path); void WriteAllText(string path, string text); void EnsureDirectory(string path, bool isFile); }