Xamarin forms error solution

• Problem : MTOUCH: error MT0091: This version of Xamarin.iOS requires the iOS 10.3 SDK (shipped with Xcode 8.3) when the managed linker is disabled. Either upgrade Xcode, or enable the managed linker.
• Solution : Xamarin Stable with iOS 10.3 SDK / Xcode 8.3

• Problem : debugging.targets(516,2): error : FastDev Directory Creation Failed
• Solution : Android: Deployment failed. FastDev directory creation failed