回答編集履歴

  こんなのでいいですか？

  using System;

  using System.IO;

  using System.Linq;

  using System.Text;

  using Newtonsoft.Json;

 

  namespace CsvRead

  {

  class Test

  {

  static void Main()

  {

  var sr = new StreamReader(@"test.csv", Encoding.GetEncoding("shift_jis"));

  {

  var keys = sr.ReadLine().Split(',');

  while(!sr.EndOfStream)

  {

  var values = sr.ReadLine().Split(',');

  var dic = keys.Zip(values, (k, v) => new { k, v }).ToDictionary(x => x.k, x => x.v);

  Console.WriteLine(JsonConvert.SerializeObject(dic));

  }

  }

  }

  }

  }

  ```

 

  参考

  [.net - Map two lists into a dictionary in C# - Stack Overflow](https://stackoverflow.com/questions/4038978/map-two-lists-into-a-dictionary-in-c-sharp)