gistfile1.cs

System.Random RandNum = new System.Random();
checkedNum = RandNum.Next(1, 3).ToString();
List<int> rands = new List<int>();
for (int x = 1; x <= Convert.ToInt16(checkedNum); x++)
    rands.Add(RandNum.Next(1, 76));

for (int x = 1; x <= 76; x++)
{
    if (rands.Contains(x) && Q205.Choices[x - 1].ShowChoice)
        helper += "Q205_" + x + "=1;";
    else
        helper += "Q205_" + x + "=;";
}