using System;

using System.Linq;                  

public class Program

{

    public static void Main()

    {

        var lst = new int[] { 1, 2, 1, 0, 3 , 2};

        int sum = 0;

        var result = lst.Select(x => { sum += x; return sum; });

        foreach(var item in result)

            Console.WriteLine(item);

    }

}