public bool Exists(string virtualPath)
 {
     return(vfs.ResolvePath(virtualPath).Exists);
 }
        public void TestResolve()
        {
            var a = new FileInfo(Path.Join(Directory.GetCurrentDirectory(), "a/b/abcd"));

            Assert.AreEqual(a.FullName, vfs.ResolvePath("a/b/abcd").FullName);
        }