System.IO.Abstractions.DirectoryInfoBase.GetFiles C# (CSharp) Méthode

        public abstract FileInfoBase[] GetFiles();
        public abstract FileInfoBase[] GetFiles(string searchPattern);

 private static string TryReadNpmVersion(DirectoryInfoBase nodeDir)
 {
     var npmRedirectionFile = nodeDir.GetFiles("npm.txt").FirstOrDefault();
     if (npmRedirectionFile == null)
     {
         return null;
     }
     using (StreamReader reader = new StreamReader(npmRedirectionFile.OpenRead()))
     {
         return reader.ReadLine();
     }
 }