EvoCalculator.Core/EvoCalculator.Core.Tools/Array/Concat.cs

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

namespace EvoCalculator.Core.Tools.Array
{
    public static class Array<T>
    {
        public static T[] Concat(params IEnumerable<T>[] arrays)
        {
            return arrays.Aggregate(System.Array.Empty<T>(),
                (current, arr) => current.Concat(arr).ToArray());
        }
    }
}