如何从C#中的文本文件中删除一行？

using System;
using System.IO;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
        string filePath = "example.txt";
        string searchText = "delete";

        try
        {
            string[] lines = File.ReadAllLines(filePath);
            string[] newLines = Array.FindAll(lines, line => !line.Contains(searchText));

            File.WriteAllLines(filePath, newLines);
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error: " + ex.Message);
        }
    }
}