//Directory Path

        string directoryPath = @"C:\Users\Gary\Desktop\Test";

 

        //Files In Directory

        List<string> filesInDirectory = new List<string> { };

 

        //Bool User Has Files

        bool userHasFiles;

 

        //Required Files

        string[] requiredFiles =

        {

           "lol.txt",

           "lol2.txt"

                     

        };

 

        private void GetFilesInDirectory(string directoryPath)

        {

            var files = Directory.GetFiles(directoryPath);

 

            foreach (var myfiles in files)

            {

                var fileName = myfiles.Remove(0, directoryPath.Length + 1);

                filesInDirectory.Add(fileName);

            }

        }

 

        private bool UserHasRequiredFiles()

        {

            return requiredFiles.All(filesInDirectory.Contains);

        }

 

 

        private void Form1_Load(object sender, EventArgs e)

        {

            GetFilesInDirectory(directoryPath);

            userHasFiles = UserHasRequiredFiles();

            MessageBox.Show(userHasFiles.ToString());

            filesInDirectory.Clear();

        }

    }

}