public void CheckStringAndThrowException_ParameterIsNullOrEmpty_ThrowsArgumentNullException(string str)
 {
     Assert.Throws <ArgumentNullException>(() => ThrowingExceptions.CheckStringAndThrowException(str), "ThrowingExceptions.CheckStringAndThrowException should throw an ArgumentNullException.");
 }
 public string CheckStringAndThrowException_ParameterIsNotNullOrEmpty_ReturnWithoutException(string str)
 {
     return(ThrowingExceptions.CheckStringAndThrowException(str));
 }