I have installed monodevelop with sudo apt-get install monodevelop
but it crashed on my machine (amd64) and mono version was quite old 1.1.8.3 (default on breezy)
Remove the old version apt-get remove mono monodevelop

wget http://go-mono.com/sources/libgdiplus-1.1/libgdiplus-1.1.10.tar.gz
tar zxf libgdiplus-1.1.10.tar.gz
cd libgdiplus-1.1.10
./configure --prefix=/usr
make;sudo make install;cd ..

wget http://go-mono.com/sources/mono-1.1/mono-1.1.10.tar.gz
tar zxf mono-1.1.10.tar.gz
cd mono-1.1.10
./configure --prefix=/usr
make;sudo make install;cd ..

sudo apt-get install gnome-devel libgtkhtml2-dev libgtkhtml3.6-dev libvte-dev

wget http://go-mono.com/sources/gtk-sharp-2.0/gtk-sharp-2.4.0.tar.gz
tar zxf gtk-sharp-2.4.0.tar.gz
cd gtk-sharp-2.4.0
./configure --prefix=/usr
make;sudo make install;cd ..

sudo apt-get install libgtksourceview-dev
wget http://go-mono.com/sources/gtksourceview-sharp-2.0/gtksourceview-sharp-2.0-0.10.tar.gz
tar zxf gtksourceview-sharp-2.0-0.10.tar.gz
cd gtksourceview-sharp-2.0-0.10
./configure --prefix=/usr
make;sudo make install;cd ..

wget http://go-mono.com/sources/monodoc/monodoc-1.1.9.tar.gz
tar zxf monodoc-1.1.9.tar.gz
cd monodoc-1.1.9
./configure --prefix=/usr
make;sudo make install;cd ..

wget http://go-mono.com/sources/gecko-sharp-2.0/gecko-sharp-2.0-0.11.tar.gz
tar zxf gecko-sharp-2.0-0.11.tar.gz
cd gecko-sharp-2.0-0.11
./configure --prefix=/usr
make;sudo make install;cd ..


something was missing i did an apt-cache search XML::Parser
sudo apt-get install libxml-perl

wget http://go-mono.com/sources/monodevelop/monodevelop-0.9.tar.gz
tar xvf monodevelop-0.9.tar.gz
cd monodevelop-0.9



./configure --prefix=/opt/monodevel
make;sudo make install;cd ..

/opt/monodevel/bin/monodevelop

Create new console project

File->New Solution/Project-> C# -> Console Project

Name it "GoodbyeWorld" then choose Next

Then Run (F5)