+To add the Mono Project GPG signing key and the package repository (http://www.mono-project.com/docs/getting-started/install/linux/):
+
+sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
+echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list
+sudo apt-get update
+
+To install Mono:
+
+sudo apt-get install mono-devel
+sudo apt-get install mono-complete
+sudo apt-get install referenceassemblies-pcl
+sudo apt-get install ca-certificates-mono
+
+To install SWIG:
+
+a) Download Swig-3.0.10 from http://www.swig.org/download.html
+b) Untar the files and refer "INSTALL" file to install Swig as mentioned below:
+ 1) ./configure --with-csharp-compiler=/usr/bin/mcs
+ (/usr/bin/mcs is the mono compiler path from step 1)
+ 2) make
+ 3) sudo make install
+
To build C# binding for Ubuntu desktop using SWIG for the first time:
./autogen.sh