Regionify copyright statement
diff --git a/src/ProtocolBuffers.Test/CSharpOptionsTest.cs b/src/ProtocolBuffers.Test/CSharpOptionsTest.cs
index a0e04fc..2c75597 100644
--- a/src/ProtocolBuffers.Test/CSharpOptionsTest.cs
+++ b/src/ProtocolBuffers.Test/CSharpOptionsTest.cs
@@ -1,4 +1,5 @@
-// Protocol Buffers - Google's data interchange format
+#region Copyright notice and license
+// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// http://github.com/jskeet/dotnet-protobufs/
// Original C++/Java/Python code:
@@ -29,6 +30,8 @@
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#endregion
+
using Google.ProtocolBuffers.DescriptorProtos;
using Google.ProtocolBuffers.Descriptors;
using NUnit.Framework;