I really want to know is Cloud 9(https://c9.io/) support .Net(C#)? My target is using .Net 4.0 + MVC 3.0 for my project.
There are "Run With" future for "New Runner", is that can make Cloud 9 support .Net?
Yes, it does.
Add the Mono Project GPG signing key and the package repository
sudo apt-key adv --keyserver keyserver.ubuntu.com --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
sudo apt-get update --fix-missing
Then install Mono as described
sudo apt-get install mono-complete
sudo apt-get install mono-devel
sudo apt-get install referenceassemblies-pcl
To compile, use mcs:
mcs filename.cs
The compiler will create filename.exe, which you can run using:
mono filename.exe