Revert "THRIFT-4982 Remove deprecated C# bindings from the code base"

Only compiler, test, lib and tutorial code.
diff --git a/test/csharp/Makefile.am b/test/csharp/Makefile.am
new file mode 100644
index 0000000..ad166e3
--- /dev/null
+++ b/test/csharp/Makefile.am
@@ -0,0 +1,95 @@
+#
+# 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.
+#
+
+GENERATED = \
+	gen-csharp/Thrift/Test/Bonk.cs \
+	gen-csharp/Thrift/Test/Bools.cs \
+	gen-csharp/Thrift/Test/BoolTest.cs \
+	gen-csharp/Thrift/Test/CrazyNesting.cs \
+	gen-csharp/Thrift/Test/EmptyStruct.cs \
+	gen-csharp/Thrift/Test/GuessProtocolStruct.cs \
+	gen-csharp/Thrift/Test/Insanity.cs \
+	gen-csharp/Thrift/Test/LargeDeltas.cs \
+	gen-csharp/Thrift/Test/ListBonks.cs \
+	gen-csharp/Thrift/Test/ListTypeVersioningV1.cs \
+	gen-csharp/Thrift/Test/ListTypeVersioningV2.cs \
+	gen-csharp/Thrift/Test/NestedListsBonk.cs \
+	gen-csharp/Thrift/Test/NestedListsI32x2.cs \
+	gen-csharp/Thrift/Test/NestedListsI32x3.cs \
+	gen-csharp/Thrift/Test/NestedMixedx2.cs \
+	gen-csharp/Thrift/Test/Numberz.cs \
+	gen-csharp/Thrift/Test/OneField.cs \
+	gen-csharp/Thrift/Test/SecondService.cs \
+	gen-csharp/Thrift/Test/StructA.cs \
+	gen-csharp/Thrift/Test/StructB.cs \
+	gen-csharp/Thrift/Test/ThriftTest.Constants.cs \
+	gen-csharp/Thrift/Test/ThriftTest.cs \
+	gen-csharp/Thrift/Test/VersioningTestV1.cs \
+	gen-csharp/Thrift/Test/VersioningTestV2.cs \
+	gen-csharp/Thrift/Test/Xception.cs \
+	gen-csharp/Thrift/Test/Xception2.cs \
+	gen-csharp/Thrift/Test/Xtruct.cs \
+	gen-csharp/Thrift/Test/Xtruct2.cs \
+	gen-csharp/Thrift/Test/Xtruct3.cs
+
+BUILT_SOURCES = $(GENERATED)
+
+if MONO_MCS
+CSC = mcs
+else
+CSC = gmcs
+endif
+
+if NET_2_0
+CSC_DEFINES = -d:NET_2_0
+endif
+
+LIBDIR = $(top_builddir)/lib/csharp
+
+THRIFT = $(top_builddir)/compiler/cpp/thrift
+
+$(GENERATED): $(top_srcdir)/test/ThriftTest.thrift $(THRIFT)
+	$(THRIFT) --gen csharp -o . $<
+
+precross: TestClientServer.exe
+
+ThriftImpl.dll: $(GENERATED) $(LIBDIR)/Thrift.dll
+	$(CSC) $(CSC_DEFINES) -t:library -out:$@ -reference:$(LIBDIR)/Thrift.dll $(GENERATED)
+
+SRCS = TestClient.cs TestServer.cs Program.cs
+
+TestClientServer.exe: $(SRCS) ThriftImpl.dll
+	$(CSC) $(CSC_DEFINES) -out:$@ -reference:$(LIBDIR)/Thrift.dll -reference:ThriftImpl.dll $(SRCS)
+
+clean-local:
+	$(RM) -rf gen-csharp *.exe *.dll
+
+TESTPORT = 9500
+check-local: TestClientServer.exe
+	MONO_PATH=$(LIBDIR) timeout 10 mono TestClientServer.exe server --port=$(TESTPORT) &
+	sleep 1
+	MONO_PATH=$(LIBDIR) mono TestClientServer.exe client --port=$(TESTPORT)
+
+EXTRA_DIST = \
+	Properties/AssemblyInfo.cs \
+	ThriftTest.csproj \
+	ThriftTest.sln \
+	Program.cs \
+	TestServer.cs \
+	TestClient.cs