这一篇与上一篇比较类似，目的相同，不同之处为读入到了list中，list泛型集合可以当作可变长数组使用。通过StreamReader创建一个流sr，然后通过一个while循环将读得的每行数据放入字符串类型的list中，之后对每个list分割，并返回一个字符串数组，这个字符串数组就可以通过转化为double来计算了，计算完成后可以通过放入sb中统一写入到文本文档中。-This is a comparison similar to the previous one, the same purpose, except to read into the list in, list generic collections can be used as a variable length arrays use. Create a flow through StreamReader sr, then read through each row of data into a while loop of string type list, and then dividing each list, and returns a string array, the array of strings can be transformed by to calculate the double, the completion of the calculation can be unified into sb written into the text document.