CSV To Json Array Azure Function

CSVToJsonArray.cs

#r "newtonsoft.json"
using Newtonsoft.Json.Linq;
using System;
using System.Linq;
using System.Net;

public static async Task<HttpResponseMessage> Run(HttpRequestMessage req, TraceWriter log)
{
    log.Info("C# HTTP trigger function processed a request.");

    var csvContent = await req.Content.ReadAsStringAsync();
    var csvContentLines = csvContent.Split(
        new[] { Environment.NewLine },
        StringSplitOptions.None
    );

    var jsonArray = GetJsonArray(
        header: csvContentLines.First(),
        csvLines: csvContentLines.Skip(1).ToArray()
    );

    return req.CreateResponse(HttpStatusCode.OK, jsonArray);
}

private static JArray GetJsonArray(string header, string[] csvLines, char delimiter = ',')
{
    if (!csvLines.Any())
    {
        return new JArray();
    }

    if (string.IsNullOrEmpty(header))
    {
        throw new ArgumentException(paramName: nameof(header), message: "Cannot be null or empty.");
    }

    var headerParts = header.Split(delimiter);

    if (headerParts.GroupBy(part => part).Where(partGroup => partGroup.Count() > 1).Any())
    {
        throw new InvalidOperationException($"There are repeating headers in '{header}'");
    }

    var jsonArray = new JArray();

    foreach (var line in csvLines)
    {
        var csvParts = line.Split(delimiter);

        if (csvParts.Count() != headerParts.Count())
        {
            throw new InvalidOperationException($"The columns in CSV line '{line}' does not match the header '{header}'");
        }

        jsonArray.Add(GetJObject(headerParts, csvParts));
    }

    return jsonArray;
}

private static JObject GetJObject(string[] headerParts, string[] rowParts)
{
    var jsonObject = new JObject();

    for (var i = 0; i < headerParts.Count(); i++)
    {
        jsonObject.Add(headerParts[i], rowParts[i]);
    }

    return jsonObject;
}