如何在c#中更新或替换csv数据

using System;
using System.IO;

class Program
{
    static void Main()
    {
        // 读取CSV文件
        string csvFilePath = "path/to/your/csv/file.csv";
        string[] lines = File.ReadAllLines(csvFilePath);

        // 解析CSV数据
        string[,] data = new string[lines.Length, lines[0].Split(',').Length];
        for (int i = 0; i < lines.Length; i++)
        {
            string[] fields = lines[i].Split(',');
            for (int j = 0; j < fields.Length; j++)
            {
                data[i, j] = fields[j];
            }
        }

        // 更新或替换数据
        int rowIndexToUpdate = 1; // 要更新的行索引
        int columnIndexToUpdate = 2; // 要更新的列索引
        string newValue = "New Value"; // 新的值
        data[rowIndexToUpdate, columnIndexToUpdate] = newValue;

        // 写入CSV文件
        using (StreamWriter writer = new StreamWriter(csvFilePath))
        {
            for (int i = 0; i < lines.Length; i++)
            {
                string line = string.Join(",", GetRow(data, i));
                writer.WriteLine(line);
            }
        }

        Console.WriteLine("CSV数据已更新或替换。");
    }

    static string[] GetRow(string[,] data, int rowIndex)
    {
        int columns = data.GetLength(1);
        string[] row = new string[columns];
        for (int i = 0; i < columns; i++)
        {
            row[i] = data[rowIndex, i];
        }
        return row;
    }
}