private void SetFileProperties(string fileName, string documentName) { if (string.IsNullOrEmpty(fileName)) { throw new ArgumentNullException(nameof(fileName)); } if (string.IsNullOrEmpty(documentName)) { throw new ArgumentNullException(nameof(documentName)); } if (!_fileProxy.FileExists(fileName)) { throw new FileNotFoundException(fileName); } _fileName = fileName; _documentName = documentName; }