How can I use Visual C# for Torque3D MIT?

#1 Click the "Home" button in the menu bar. it's the large Ad at the top of that page. Or go to Winterleaf dev site:
www.winterleafentertainment.com/Products/DotNetTorque.aspx

Sentence removed.

EDIT: Thank you Lukas. Sometimes when reading all the new and great things the community does, I get some details wrong. Thanks for the correction :-)

#2 @Scott swapping out Torque Script for Python is none of WLE's doing. That is Frank Carney and he released it for free (find it on the resources page).

@Taylor
For using C# for developing apps you would have to go with DotNetTorque by Winterleaf Entertainment as Scott says, there is no native support for that.
It sounds like you are talking about using the IDE for writing TorqueScript tho and not writing in C#, and you can't use Visual C# for that.
There are a few options, Torsion (I have you have found yourself), TIDE (free and open source) and there is some syntax highlighting plugins for notepad++ around the net aswell.
There have been talk about creating a new IDE for TorqueScript but I have not seen anyone begin on a project yet.

#3 oh I have TIDE, so how can I open the torque script files with T3D MIT? Cause I only see a Torsion option.

#4 Oh you mean through the toolbox? You would have to click OpenFolder and set up your project manually (if TIDE supports projects) or simply open the torquescript files in the "game" folder in TIDE.

All your scripts should be in the "game" folder

#5 The Toolbox is dead and deprecated. You all should be using the Project Manager, which removes the links to the various 3rd party tools. It does, however, have a button that will open up you chosen project's directory in an explorer window from which you have access to the build files (for the VS solution) and the game directory from which simply double-clicking any script file will open up your chosen application for editing the script files: this can be VS, Torsion, Notepad, Notepad++, Text Edit, Crimson Editor, UltraEdit, Tide, Tribal IDE, etc, etc... of course if you want the script project setup for your chosen app (other than Torsion) you'll have to do that yourself. A little tip: the Tribes script editor (Tribal IDE) works almost the same as Torsion does, even down to the same annoyances.