How can I install Visual Studio?

You can try Wine, but per the Wine application database, Visual Studio generally works poorly under Wine:

From this Wine site page:

What works
nothing, install fails

What does not
n/a

What was not tested
n/a

http://appdb.winehq.org/objectManager.php?sClass=application&iId=892

You'll need to run a virtual machine. Wine won't be able to handle it. Look into install VirtualBox (not necessarily the best but easier). You'll need to create a windows VM and then once you have windows installed install Visual Studio.

If you're looking at equivalent IDEs. Qt Creator, Eclipse, KDevelop, Anjuta, Intellij can all act as possible alternatives depending on the language you wish you develop in.

Possibly useful link on how install windows on VirtualBox: http://www.wikihow.com/Install-Windows-XP-on-Ubuntu-with-VirtualBox

You can use the Mono Development IDE to write .NET code in Ubuntu, rather than trying to use a Microsoft product in a non-Microsoft OS (which others have rightly pointed out is never going to be supported, easy, or in MS' best interests).

It has most of the features of Visual Studio, and will run faster and be more stable.

To install monodevelop, use this command in a terminal:

sudo apt-get install monodevelop

Monodevelop Home page: http://monodevelop.com/