using System;

​

string[,] data = new string[,] {

    {"one", "*", "1"},

    {"two", "*", "1"},

    {"three", "*", "1"}

};

​

string choice = select(data, "*");

Console.WriteLine(choice);

​

string select(string[,] selections, string filter) {

    int count = selections.GetLength(0);

    var rand = new Random();

    string selected = "";

    int weight = 0;

    int total = 1;

    for (int i=0; i < count; i++) {

        weight = Int32.Parse( selections[i, 2] );

        total += weight;

        if (rand.Next(1, total) <= weight) selected = selections[i, 0];

    }

    return selected;

};