diff --git a/lib/csharp/src/Thrift.sln b/lib/csharp/src/Thrift.sln
index c4cdad8..2955379 100644
--- a/lib/csharp/src/Thrift.sln
+++ b/lib/csharp/src/Thrift.sln
@@ -1,4 +1,22 @@
-﻿
+﻿#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+
 Microsoft Visual Studio Solution File, Format Version 10.00
 # Visual Studio 2008
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Thrift", "Thrift.csproj", "{499EB63C-D74C-47E8-AE48-A2FC94538E9D}"