C#关于正则匹配并提取txt文件中正负小数的问题

C# 我想要提取如图文档里的正负小数存到数组里，代码怎么修改？

 private void button2_Click(object sender, EventArgs e)
        {
            string f;
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                f = openFileDialog1.FileName;               
            }
            string lineread=string.Empty ;
            string curFileName;
            curFileName = openFileDialog1.FileName;
            StreamReader sr = new StreamReader(curFileName);
            double[] wfwys = new double[12];//提取存到这个数组           
            int p = 0;
            while ((lineread = sr.ReadLine()) != null)
            {
                 lineread = sr.ReadLine();
                 lineread = Convert.ToString(lineread);
                if ( ! Regex.IsMatch(lineread, @"[\u4e00-\u9fbb]"))//排除有汉字的行
                {
                    if (Regex.IsMatch(lineread, @"^[\\+\\-]?[\\d]+(\\.[\\d]+)?$"))//排除没有小数的行
                    {
                        Match substring = Regex.Match(lineread, @"^[\\+\\-]?[\\d]+(\\.[\\d]+)?$");
                        wfwys[p] = double.Parse(substring.Value);
                        p++;
                    }
                }

            }
            textBox2.Text = Convert.ToString(wfwys[0]);
            textBox3.Text = Convert.ToString(wfwys[1]);
            textBox4.Text = Convert.ToString(wfwys[2]);
                        。。。。。。

参考网上的资源，最后编译成功了
string f;

        if (openFileDialog1.ShowDialog() == DialogResult.OK)
        {

            f = openFileDialog1.FileName;

        }

        string lineread = string.Empty;

        string curFileName;

        curFileName = openFileDialog1.FileName;

        StreamReader sr = new StreamReader(curFileName);

        double[] wfwys = new double[12];

        int p = 0;

        while ((lineread = sr.ReadLine()) != null)
        {

            lineread = sr.ReadLine();

            lineread = Convert.ToString(lineread);

            MatchCollection mt = Regex.Matches(lineread, @"[\u4e00-\u9fa5]");//这里用Matches匹配,如果有一个汉字,则匹配成功.汉字的unicode编码是4e00到9fa5

            if (mt.Count == 0)
            { //如果没有汉字的行

                MatchCollection mc = Regex.Matches(lineread, @"[+\-]?\d+\.\d+");//这里用Matches匹配,如果有小数,则匹配成功.因为小数不是一整行,所以去掉^和$

                if (mc.Count > 0)
                {//如果有小数的行

                    //Match substring = Regex.Match(lineread, @"[+-]?\d+\.\d+");//这里去掉这句,因为上面有匹配结果mc了

                    foreach (Match m in mc)
                    {  //这里遍历mc,因为一行只有一个小数,所以一行存一个小数到wfwys数组

                        wfwys[p] = double.Parse(m.Groups[0].Value); //这里把substring.Value改成m.Groups[0].Value

                        p++;

                    }

                }

            }

        }
        textBox2.Text = Convert.ToString(wfwys[0]);
                textBox3.Text = Convert.ToString(wfwys[1]);
                textBox4.Text = Convert.ToString(wfwys[2]);
                textBox5.Text = Convert.ToString(wfwys[3]);

正则用起来真的好深奥啊......

double[] wfwys = {};
string pattern = @"(\-){0,1}\d+(\.\d+){0,1}";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
wfwys = File.ReadAllLines(openFileDialog1..FileName).Where(x => Regex.IsMatch(x, pattern))
.Select(x => Regex.Match(x, pattern).Value)
.Select(x => double.Parse(x))
.ToArray();
}