CodeGraphContext

using System; using System.Collections.Generic; using System.Linq; namespace Example.App.Utils { /// <summary> /// Helper class for collection operations /// </summary> public static class CollectionHelper { /// <summary> /// Calculates the sum of squares of all numbers in the collection /// </summary> public static int SumOfSquares(IEnumerable<int> numbers) { if (numbers == null) { throw new ArgumentNullException(nameof(numbers)); } return numbers.Select(n => n * n).Sum(); } /// <summary> /// Filters even numbers from the collection /// </summary> public static IEnumerable<int> FilterEven(IEnumerable<int> numbers) { return numbers.Where(n => n % 2 == 0); } /// <summary> /// Finds the maximum value in the collection /// </summary> public static int FindMax(IEnumerable<int> numbers) { if (!numbers.Any()) { throw new InvalidOperationException("Collection is empty"); } return numbers.Max(); } } }