static string[] ConcatLessThan1k(string[] source) =>
			source.Aggregate((list:new List<string>(), bld :new StringBuilder()), (state, txt) =>
			{
				if (state.bld.Length + txt.Length >= 1000)
				{
					state.list.Add(state.bld.ToString());
					state.bld.Clear();
				}
				else
				{
					state.bld.Append(txt);
				}

				return state;
			}, state => state.list.ToArray());