在文本文件中写入,而不是覆盖,在C#中

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string filePath = "example.txt";
        string textToAppend = "This is a new line.";

        using (StreamWriter writer = new StreamWriter(filePath, append: true))
        {
            writer.WriteLine(textToAppend);
        }
    }
}