从C#中导出CSV文件的列中删除掩码

using System;
using System.Collections.Generic;
using System.IO;

public class CSVExporter
{
    public void ExportCSVWithoutMaskedColumns(List<List<string>> data, string filePath, List<int> maskedColumns)
    {
        using (StreamWriter writer = new StreamWriter(filePath))
        {
            foreach (List<string> row in data)
            {
                for (int i = 0; i < row.Count; i++)
                {
                    if (!maskedColumns.Contains(i))
                    {
                        writer.Write(row[i]);
                    }
                    
                    if (i < row.Count - 1)
                    {
                        writer.Write(",");
                    }
                }
                
                writer.WriteLine();
            }
        }
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        // 读取CSV文件并将数据存储在二维数组中
        List<List<string>> data = ReadCSVFile("input.csv");

        // 定义需要删除掩码的列索引
        List<int> maskedColumns = new List<int> { 2, 4 };

        // 创建CSVExporter对象并调用导出方法
        CSVExporter exporter = new CSVExporter();
        exporter.ExportCSVWithoutMaskedColumns(data, "output.csv", maskedColumns);
    }

    public static List<List<string>> ReadCSVFile(string filePath)
    {
        List<List<string>> data = new List<List<string>>();

        using (StreamReader reader = new StreamReader(filePath))
        {
            string line;
            while ((line = reader.ReadLine()) != null)
            {
                List<string> row = new List<string>(line.Split(','));
                data.Add(row);
            }
        }

        return data;
    }
}