using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var list = new List<object> { new { Odsetki = 1.4M }, new { Odsetki = 1.6M }, new { Odsetki = 1.2M },new { Odsetkishit = 1.4M } };

        Console.WriteLine(GetValue(list[0], "Odsetki"));

        Console.WriteLine(GetValue(list[1], "Odsetki"));

        Console.WriteLine(GetValue(list[2], "Odsetki"));

        Console.WriteLine(GetValue(list[3], "Odsetki"));

        Console.WriteLine(list.Select(x => GetValue(x, "Odsetki")).Sum());

    }

    private static decimal GetValue(object obj, string fieldName)

    {

        var field = obj.GetType().GetProperty(fieldName);

        if(field == null || field.PropertyType != typeof(decimal)) return 0;

        return (decimal)field.GetValue(obj);        

    }

}