using System.Linq;

using static System.Console;

​

public class Program

{

    public static void Main()

    {

        string teste = "#10##10##50##100#";

        var arr = teste.Split('#').ToList();

        arr.RemoveAll(x => x == "");

        decimal soma = 0;

        foreach(var v in arr)

        {

            decimal vlr;

            decimal.TryParse(v, out vlr);

            soma += vlr;

        }

        decimal media = soma / arr.Count;

        WriteLine($"Soma: {soma} Média: {media}");

    }

}