编辑:已删除旧版本
这与Daniel的版本类似，但将提供完整的范围.它还引入了一种新的扩展方法来获得一个随机的"任意整数"值，我认为这很方便.
注意这里小数的分布是is not uniform.
/// <summary>
/// Returns an Int32 with a random value across the entire range of
/// possible values.
/// </summary>
public static int NextInt32(this Random rng)
{
int firstBits = rng.Next(0, 1 << 4) << 28;
int lastBits = rng.Next(0, 1 << 28);
return firstBits | lastBits;
}
public static decimal NextDecimal(this Random rng)
{
byte scale = (byte) rng.Next(29);
bool sign = rng.Next(2) == 1;
return new decimal(rng.NextInt32(),
rng.NextInt32(),
rng.NextInt32(),
sign,
scale);
}