diff --git a/.vs/test(1st chapter)/DesignTimeBuild/.dtbcache b/.vs/test(1st chapter)/DesignTimeBuild/.dtbcache
index 47bbffd..6cb88ce 100644
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diff --git a/.vs/test(1st chapter)/v15/.suo b/.vs/test(1st chapter)/v15/.suo
index 0be1755..8a85e3e 100644
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diff --git a/.vs/test(1st chapter)/v15/Server/sqlite3/storage.ide-shm b/.vs/test(1st chapter)/v15/Server/sqlite3/storage.ide-shm
index 6814d0b..432e026 100644
Binary files a/.vs/test(1st chapter)/v15/Server/sqlite3/storage.ide-shm and b/.vs/test(1st chapter)/v15/Server/sqlite3/storage.ide-shm differ
diff --git a/.vs/test(1st chapter)/v15/Server/sqlite3/storage.ide-wal b/.vs/test(1st chapter)/v15/Server/sqlite3/storage.ide-wal
index deb8fba..965b812 100644
Binary files a/.vs/test(1st chapter)/v15/Server/sqlite3/storage.ide-wal and b/.vs/test(1st chapter)/v15/Server/sqlite3/storage.ide-wal differ
diff --git a/test(1st chapter)/Program.cs b/test(1st chapter)/Program.cs
index 6c6913a..722dfd3 100644
--- a/test(1st chapter)/Program.cs	
+++ b/test(1st chapter)/Program.cs	
@@ -261,7 +261,7 @@ namespace test_1st_chapter_
             float ff3 = -0.0f;
             float ff4 = -1.0f;
             WriteLine("{0} {1} {2} {3}\n{4}", ff1 / ff2, ff1 / ff3, ff4 / ff2, ff4 / ff3, ff2 / ff2);
-            WriteLine("hello");
+            WriteLine("hello new world 2");
                             
             ReadKey();
         }