static void Main(string[] args) { string FilePath = @"ExampleFiles/Employee.xlsx"; FileInfo file = new FileInfo(FilePath); Stream fileStream = file.OpenRead(); IExcelParser _excelParser = new ExcelParser(); IObjectValidator _objectValidator = new ObjectValidator(); List <Employee> models = _excelParser.ParseExcelList <Employee>(fileStream, "EmployeeList"); KeyValuePair <bool, string> Result = _objectValidator.Validate <Employee>(models); Console.ReadLine(); }