c# - 计数和删除数字

Question

我已经从一个匹配的文件中读取并写入另一个匹配一个数字的次数。如何删除每个号码并只为该号码留下一条记录。我的意思是现在我得到：

Count of matching numbers in this group: 123
Numbers:
...123 times this number i.e 123 lines.

如何删除这个号码并这样写：

Count of matching numbers in this group: 123
Number: the number

这就是我现在的做法：

        string path = "file1.txt";

        var result = (File.ReadLines(path)).OrderBy(x => x).GroupBy(x => x);

        using (var writer = new StreamWriter("file2.txt"))
        {
            foreach (var item in result)
            {
                string outGrp = String.Format("Count of matching numbers in this group: {0}", item.Count());
                Console.WriteLine(outGrp);
                writer.WriteLine(outGrp, true);
                Console.WriteLine("Numbers:");
                writer.WriteLine("Numbers:", true);

                foreach (var member in item)
                {
                    Console.WriteLine(member);
                    writer.WriteLine(member, true);
                }
            }
        }

Answer 1

我猜你想改变

foreach (var member in item)
{
    Console.WriteLine(member);
    writer.WriteLine(member, true);
}

变成这样：

var number = item.First();

Console.WriteLine(number);
writer.WriteLine(number, true);

Answer 2

一个班轮

foreach (var member in item)
{
    Console.WriteLine(member);
    writer.WriteLine(member, true);
    break; //<---- slam on the brake (sp?) D:
}