A simple implementation of a CSV Writer in C#

CsvWriter.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Text;

namespace Utilities
{
  public class CsvWriter
  {
    public static string ToCsv<T>(IEnumerable<T> objectsToExport)
    {
      var sb = new StringBuilder();

      var props = typeof (T).GetProperties(BindingFlags.GetProperty | BindingFlags.Public | BindingFlags.Instance);

      for (int i = 0; i < props.Length; i++)
      {
        var prop = props[i];
        if (i > 0)
        {
          sb.Append(",");
        }

        string propertyName = prop.Name;

        var firstDescription = prop.GetCustomAttributes(typeof (DescriptionAttribute), true).Cast<DescriptionAttribute>().FirstOrDefault();
        if (firstDescription != null && !String.IsNullOrWhiteSpace(firstDescription.Description))
          propertyName = firstDescription.Description.Trim();

        sb.Append(Enquote(propertyName));
      }

      sb.AppendLine();

      foreach (var obj in objectsToExport)
      {
        for (int i = 0; i < props.Length; i++)
        {
          var prop = props[i];
          if (i > 0)
          {
            sb.Append(",");
          }

          object propertyValue = prop.GetValue(obj, null);
          sb.Append(Enquote(propertyValue.ToString()));
        }

        sb.AppendLine();
        
      }

      return sb.ToString();
    }

    private static string Enquote(string value)
    {
      string result = value ?? String.Empty;
      if (result.Contains("\"") || result.Contains(",") || result.Contains("\r") || result.Contains("\n"))
      {
        result = String.Concat("\"", result.Replace("\"","\"\""), "\"");
      }

      return result;
    }
  }
}