ExpressionThread from clojure to c#

ExpressionThread.cs

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

public static class ThreadExpression
{
    public static T Thread<T>(this T obj, params Action<T>[] argsRest)
    {
        foreach (var item in argsRest)
        {
            item(obj);
        }

        return obj;
    }

    public static T Thread<T>(this T obj, params Func<T,T>[] argsRest)
    {
        foreach (var item in argsRest)
        {
            obj = item(obj);
        }

        return obj;
    }
}

class Program
{
    static void Main(string[] args)
    {
        var s = new StringBuilder("").Thread(
            x => x.Append("1"),
            x => x.Append(",2"),
            x => x.Append(",3")
            );
        var ReplaceAllCommasAddComma = new Action<StringBuilder>[] { 
            x => x.Replace(',', ' '), 
            x => x.Append(',')
        };

        var AddCommaAndReplaceAllCommas = ReplaceAllCommasAddComma.Reverse().ToArray();//reverse is like a macro
        var s2 = s.Thread(AddCommaAndReplaceAllCommas);
        Console.WriteLine(s);
        Console.ReadKey();
    }
}