Visual Studio 2008

Here come the Visual Studio 2008, having used the Team Edition, I bet its the best IDE yet. I liked LINQ the best...

The flexibility to loosely declare variables (a La Javascript) is a cool feature..

var myVariable;
myVariable = 10;

now the 'myVariable' variable that was generically declared as 'var' assumes the functionality of a qualified int. The reflection can be immediately seen as soon as the variable has been 'type-defined'.

LINQ -

int[10] myInts = {.......};
var Query = from number in myInts where number <6 style="font-family: courier new;">