Automatically install both the 'current' and 'preview' SDKs when building in Appveyor
Automatically install both the 'current' and 'preview' SDKs when building in Appveyor

aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore