What is the best way to check the parameters of the method? [closed]

Answer 1

i know it's an old thread but i'd like to share MHO. this is what i normally do:

create a generic method:

private void ValidateArgument(Func validation, string errorMessage) where exType : Exception
        {
            if (validation())
            {
                throw Activator.CreateInstance(typeof(exType), errorMessage) as exType;
            }
        }

and then from the calling method you do:

this.ValidateArgument(() => string.IsNullOrEmpty(firstname), "firstname must be supplied");