Switch-Toolbox/Switch_Toolbox_Library/Collections/SortExtensions.cs

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

namespace Toolbox.Library
{
    public static class SortExtensions
    {
        /// <summary>
        /// Sort one collection based on keys defined in another
        /// </summary>
        /// <returns>Items sorted</returns>
        public static IEnumerable<TResult> SortBy<TResult, TKey>(
            this IEnumerable<TResult> itemsToSort,
            IEnumerable<TKey> sortKeys,
            Func<TResult, TKey> matchFunc)
        {
            return sortKeys.Join(itemsToSort,
                key => key,
                matchFunc,
                (key, iitem) => iitem);
        }
    }
}