[C#] Linq Aggregate 사용하기

시퀀스에 누적함수를 적용할때 사용됩니다.
 

namespace ConsoleApp
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string[] fruits = { "apple", "mango", "orange", "passionfruit", "grape" };

            // 문자열연결
            var data = fruits.Aggregate((str1, str2) => str1 + ", " + str2);

            Console.WriteLine(data);

            // 가장 긴 문자열 찾기
            string longestName = fruits.Aggregate((longest, next) =>
                                    next.Length > longest.Length ? next : longest);

            Console.WriteLine("The fruit with the longest name is {0}.", longestName);

            Console.Read();
        }
    }
}

 
결과

 
 
참고
https://learn.microsoft.com/ko-kr/dotnet/api/system.linq.enumerable.aggregate?view=net-7.0 

Enumerable.Aggregate 메서드 (System.Linq)