[C#] Random Decimal

public static class RandomDecimal
{
    public static int NextInt32(this System.Random rng)
    {
        int firstBits = rng.Next(0, 1 << 4) << 28;
        int lastBits = rng.Next(0, 1 << 28);
        return firstBits | lastBits;
    }
    public static decimal NextDecimalSample(this System.Random random)
    {
        var sample = 1m;
        while (sample >= 1)
        {
            var a = NextInt32(random);
            var b = NextInt32(random);
            var c = random.Next(542101087);
            sample = new System.Decimal(a, b, c, false, 28);
        }
        return sample;
    }
    public static decimal NextDecimal(this System.Random random)
    {
        return NextDecimal(random, decimal.MaxValue);
    }
    public static decimal NextDecimal(this System.Random random, decimal maxValue)
    {
        return NextDecimal(random, decimal.Zero, maxValue);
    }
    public static decimal NextDecimal(this System.Random random, decimal minValue, decimal maxValue)
    {
        var nextDecimalSample = NextDecimalSample(random);
        return maxValue * nextDecimalSample + minValue * (1 - nextDecimalSample);
    }
}