public static void NotNullEmptyOrNullElements()

in src/Microsoft.VisualStudio.Validation/Requires.cs [279:305]

• 21 lines of code
• 5 McCabe index (conditional complexity)

        public static void NotNullEmptyOrNullElements<T>([ValidatedNotNull, NotNull] IEnumerable<T> values, string? parameterName)
            where T : class // ensures value-types aren't passed to a null checking method
        {
            // To whoever is doing random code cleaning:
            // Consider the performance when changing the code to delegate to NotNull.
            // In general do not chain call to another function, check first and return as early as possible.
            if (values is null)
            {
                throw new ArgumentNullException(parameterName);
            }

            bool hasElements = false;
            foreach (T? value in values)
            {
                hasElements = true;

                if (value is null)
                {
                    throw new ArgumentException(Format(Strings.Argument_NullElement, parameterName), parameterName);
                }
            }

            if (!hasElements)
            {
                throw new ArgumentException(Format(Strings.Argument_EmptyArray, parameterName), parameterName);
            }
        }