linq Sum

public static void Sum()
        {
            // Sum - Simple
            int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 };

            double numSum = numbers.Sum();

            Console.WriteLine("The sum of the numbers is {0}.", numSum);

            // Sum - Projection
            string[] words = { "cherry", "apple", "blueberry" };

            double totalChars = words.Sum(w => w.Length);

            Console.WriteLine("There are a total of {0} characters in these words.", totalChars);
        }

Output

linq Aggregate Operators

• Count
• Sum
• Min
• Max
• Average
• Aggregate