如何在C#中删除Yaml文件末尾的3个点？

using System;
using System.IO;

public class YamlFileProcessor
{
    public static void RemoveTrailingDots(string filePath)
    {
        // 读取文件内容
        string content;
        using (StreamReader reader = new StreamReader(filePath))
        {
            content = reader.ReadToEnd();
        }

        // 去除末尾的空格和换行符
        content = content.TrimEnd();

        // 去除末尾的3个点
        if (content.EndsWith("..."))
        {
            content = content.Substring(0, content.Length - 3);
        }

        // 写入修改后的内容到文件
        using (StreamWriter writer = new StreamWriter(filePath))
        {
            writer.Write(content);
        }
    }
}

public class Program
{
    public static void Main()
    {
        string filePath = "path/to/your/yaml/file.yaml";
        YamlFileProcessor.RemoveTrailingDots(filePath);
        Console.WriteLine("Yaml文件末尾的3个点已成功删除。");
    }
}