Parallels is an excellent program for using an IMac for both Apple and PC development (more below), the only issue I encountered to date is that when I remote into my Slate [to develop in Visual Studio 2017] I lost the shift key functionality.

Oddly the CAPS lock key worked but this was not a practical work-around.   I found that if I accessed the Control Center (#1-2 in image below), changed the Keyboard setting to “Optimize for games”, that the issue was resolved – the clue was the message below this dropdown setting.

Where the IMac was purchased so I could develop in the Apple and Android environment (and my wife could use it for her business), I was pleasantly surprised to find out that if I went into “Full Screen” mode (#2 below) that I essentially had a full Windows experience with perks, e.g., I had downloaded an .rar file thinking I would have to find a utility to unpack it.  However, when I double-clicked the file it opened it while in my Windows environment using the Mac OS – very impressive.   “Coherence” is another impressive feature (#1 below), if you select this mode then your Windows applications will open under the Apple OS environment and I could access it via the Windows 10 environment (shared folder space).  With Coherence Windows and Apple applications open side-by-side as if the Windows application was native to it; it was odd seeing Visual Studio 2015 opening under the Mac OS.  

My personal preference is “Full Screen” mode as I can simply hold the control key and press the left and right arrows to switch between environments.