You may want to check out VisualD which is a visual studio addon IDE that is extremely handy and functional.
I would like to ask if there is any need in writing IDE at this
moment?
i would suggest you take a few steps back. scan the newsgroups for information about what people in the d community expect from an _ideal_ d ide. there were actual a couple threads about this lately. i'm confident you might want to rethink some of your own ideas after reading those. ;)
somebody also announced a mini- ide written in d the last days and might be looking for help. you can find it here: https://github.com/dnewbie/dpj