LINQ4.cs

public class SumNumbers
{
  private int[] numberList = {1, 2, 4, 8, 16, 32}; 

  public int SumUsingLinq()
  {
    return numberList.Sum(num => num);
  }

  public int SumUsingForeach()
  {
    var sum = 0;
    foreach (int num in numberList)
    {
      sum += num;
    }
    return sum;
  }
}