要修复循环，请以1.0开头，并将列表中的每个项目相乘，如下所示:

To fix your loop, start with 1.0 and multiply each item in the list, like this:

double r = 1.0;
for(int i = 0; i < mult.Count; i++)
{
    r = r * mult[i]; // or equivalently r *= mult[i];
}

但是为了简单起见，您可以在 Aggregate中使用一点Linq 扩展方法:

But for simplicity, you could use a little Linq with the Aggregate extension method:

double r = mult.Aggregate((a, x) => a * x);