generate random numbers lyk that its total is same as input value.

public static IEnumerable<int> GetRandom()
{
    var rand = new Random();
    while (true)
    {
        yield return
        rand.Next(.01, 3);
    }
}

public static List<int> GetThirtyThatAddToTwoHundred()
{
    do
    {
        var current = GetRandom().Take(1000);
        if (1500 == current.Sum())
        {
            return current.ToList();
        }
    } while (true);
}