I need to program dot net apps via Ubuntu, so where can I get them because I always failed to compile the source??
You can search Launchpad for PPAs:
The top few there give you the choice between stable, beta and bleeding edge software.
Even if you understand the inherent risks in running unreleased software, be aware that these PPAs are mostly maintained by individuals and you're installing software from these people. You should ask yourself:
- Do you trust the maintainer? You're giving them root on your system.
- Is it safe to run this version of Mono on Ubuntu? Will it break things that depend on other versions?
- Will I be at risk if a security flaw is found in one of these packages? Do I need urgent security patches and will this repo give me them?
I'm not saying all PPAs are evil or wrong, just be aware about what you're doing.
Debian, Ubuntu, and derivatives Add the Mono Project GPG signing key (if you don’t use sudo, be sure to switch to root):
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
Next, add the package repository (if you don’t use sudo, be sure to switch to root):
echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list
Update your package cache if necessary (i.e. run apt-get update), and run a package upgrade to upgrade existing packages to the latest available. Then install Mono as described in the Usage section.
Note: While the APT package is built against Debian Wheezy, it is compatible with a number of Debian derivatives (including Ubuntu) which means you can use the same repository across all these distributions.
After a bit of google searching I've found them here.
There is a ppa for Mono 4.x https://launchpad.net/~keks9n/+archive/monodevelop-latest
sudo add-apt-repository ppa:keks9n/monodevelop-latest
apt-get install mono-complete
this should do the trick.
In addition to the other answers is https://launchpad.net/~directhex/+archive/monoxide which is "maintained by official Debian/Ubuntu Mono team".