Added copyright

Author: zbalkan

TechnitiumLibrary.UnitTests/TechnitiumLibrary.ByteTree/ByteTreeTests.cs

@@ -1,4 +1,24 @@
-using Microsoft.VisualStudio.TestTools.UnitTesting;
+/*
+Technitium Library
+Copyright (C) 2026  Shreyas Zare (shreyas@technitium.com)
+Copyright (C) 2026  Zafer Balkan (zafer@zaferbalkan.com)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+using Microsoft.VisualStudio.TestTools.UnitTesting;
 using System;
 using System.Collections.Generic;
 using System.Linq;