从.NET核心控制器返回CSV

using Microsoft.AspNetCore.Mvc;
using System.IO;
using System.Text;

public class DataController : Controller
{
    public IActionResult DownloadCsv()
    {
        var data = new[]
        {
            new { Name = "Alice", Age = 30 },
            new { Name = "Bob", Age = 25 }
        };

        var csvContent = GenerateCsv(data);
        var stream = new MemoryStream(Encoding.UTF8.GetBytes(csvContent));
        stream.Position = 0;

        return File(stream, "text/csv", "data.csv");
    }

    private string GenerateCsv(object[] data)
    {
        var sb = new StringBuilder();
        if (data.Length > 0)
        {
            var properties = data[0].GetType().GetProperties();
            foreach (var property in properties)
            {
                sb.Append(property.Name).Append(",");
            }
            sb.Remove(sb.Length - 1, 1);
            sb.AppendLine();

            foreach (var item in data)
            {
                foreach (var property in properties)
                {
                    sb.Append(property.GetValue(item)).Append(",");
                }
                sb.Remove(sb.Length - 1, 1);
                sb.AppendLine();
            }
        }
        return sb.ToString();
    }
}