CSV builder. #csv

CsvBuilder.cs

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

namespace Utilities
{
    public class CsvBuilder
    {
        private readonly string delimiter;

        public CsvBuilder(string delimiter)
        {
            this.delimiter = delimiter;
        }

        public string GetCsv<T>(IEnumerable<T> items) where T : class
        {
            var type = items.GetType().GetGenericArguments()[0];

            var header = GetHeader(type);
            var sb = new StringBuilder();
            sb.AppendLine(header);
            foreach (var content in items)
            {
                sb.AppendLine(GetContent(content));
            }

            return sb.ToString();
        }

        private string GetHeader(Type type)
        {
            var sb = new StringBuilder();

            var props = type.GetProperties().OrderBy(p => p.Name);

            foreach (var property in props)
            {
                sb.AppendFormat("{0}{1}", property.Name, delimiter);
            }

            return sb.ToString(0, sb.Length - 1);
        }

        private string GetContent<T>(T item) where T : class
        {
            if (item is ICsv)
            {
                var csvItem = item as ICsv;
                return csvItem.ToCsv(delimiter);
            }

            var sb = new StringBuilder();
            var type = item.GetType();
            var props = type.GetProperties().OrderBy(p => p.Name);

            foreach (var property in props)
            {
                sb.AppendFormat("{0}{1}", property.GetValue(item), delimiter);
            }

            return sb.ToString(0, sb.Length - 1);
        }

        public interface ICsv
        {
            string ToCsv(string delimiter);
        }
    }

    public static class EnumerableExt
    {
        public static string ToCsv<T>(this IEnumerable<T> items, string delimiter) where T : class
        {
            var cb = new CsvBuilder(delimiter);
            return cb.GetCsv(items);
        }
    }
}