added docker files for c#
diff --git a/tools/dockerfile/grpc_csharp_mono/Dockerfile b/tools/dockerfile/grpc_csharp_mono/Dockerfile
new file mode 100644
index 0000000..d0e2d2b
--- /dev/null
+++ b/tools/dockerfile/grpc_csharp_mono/Dockerfile
@@ -0,0 +1,59 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# 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.
+
+# Dockerfile for gRPC C# (on Mono).
+FROM grpc/csharp_mono_base
+
+# Pull the latest sources
+RUN cd /var/local/git/grpc \
+ && git pull --recurse-submodules \
+ && git submodule update --init --recursive
+
+# Install the gRPC C# extension library
+RUN make install_grpc_csharp_ext -j12 -C /var/local/git/grpc
+
+# TODO: download NuGet from web. The problem is there seems to be no direct link
+# we could use :-)
+ADD NuGet.exe NuGet.exe
+
+# Restore the NuGet dependencies
+RUN cd /var/local/git/grpc/src/csharp && mono /NuGet.exe restore Grpc.sln
+
+# Build gRPC solution
+RUN cd /var/local/git/grpc/src/csharp && xbuild Grpc.sln
+
+# Add a cacerts directory containing the Google root pem file, allowing the
+# ruby client to access the production test instance
+ADD cacerts cacerts
+
+# Add a service_account directory containing the auth creds file
+ADD service_account service_account
+
+# TODO: add command to run the interop server
+CMD ["/bin/bash", "-l"]
diff --git a/tools/dockerfile/grpc_csharp_mono_base/Dockerfile b/tools/dockerfile/grpc_csharp_mono_base/Dockerfile
new file mode 100644
index 0000000..74919a7
--- /dev/null
+++ b/tools/dockerfile/grpc_csharp_mono_base/Dockerfile
@@ -0,0 +1,53 @@
+# Copyright 2015, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# 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.
+
+# Base Dockerfile for gRPC C# (on Mono).
+#
+# Includes gRPC C# installation dependencies, things that are unlikely to vary.
+FROM grpc/base
+
+# Update to a newer version of mono
+RUN apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
+RUN echo "deb http://download.mono-project.com/repo/debian wheezy main" | tee /etc/apt/sources.list.d/mono-xamarin.list
+
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+ mono-devel \
+ nunit \
+ nunit-console \
+ monodevelop
+
+# Get the source from GitHub
+RUN git clone git@github.com:grpc/grpc.git /var/local/git/grpc
+RUN cd /var/local/git/grpc && \
+ git pull --recurse-submodules && \
+ git submodule update --init --recursive
+
+# Define the default command.
+CMD ["bash","-l"]