Please run cmd as administrator before start.
cd C:\VisualStudioOffline
vs_Enterprise.exe --layout C:\VisualStudioOffline\layout --add Microsoft.VisualStudio.Workload.NetWeb --add Microsoft.VisualStudio.Workload.ManagedDesktop --add Microsoft.VisualStudio.Workload.NetCrossPlat --includeRecommended --includeOptional --lang en-US