Ubuntu 16, enable ASP.NET templates on MonoDevelop

$sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF  
$echo "deb http://download.mono-project.com/repo/debian alpha main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list  
$sudo apt-get update 

$sudo apt-get install mono-devel mono-complete ca-certificates-mono mono-xsp4 #take time

$sudo apt-get install monodevelop=5.10.0.871-0xamarin2 #[1]

May be you will get this message at create project:Access to the path “/etc/mono/registry” is denied, then 

$sudo mkdir /etc/mono/registry

$sudo chmod uog+rw /etc/mono/registry

References:
[1] https://askubuntu.com/questions/770299/monodevelop-on-xubuntu-missing-asp-net