CombineArrays

        string[] CombineArrays(params string[][] arrays)
        {
            int allength = arrays.Sum(t => t.Length);

            string[] combined = new string[allength];
            int offset = 0;
            for (int i = 0; i < arrays.Length; i++)
            {
                string[] arr = arrays[i];

                if (i > 0)
                {
                    offset += arrays[i - 1].Length;
                    Array.Copy(arr, 0, combined, offset, arr.Length);
                }
                else
                {
                    Array.Copy(arr, combined, arr.Length);
                }

            }
            return combined;
        }