Visual Studio for Mac build issue in https library, .NET 4.6.2 unknown properties

[mregen]

Type of Issue

• Bug

Describe the Issue

Buld error when projects are loaded on mac OS 10.14 / Visual Studio for Mac

To Reproduce

Steps to reproduce the behavior:

1. Open UA Core Libraries
2. Build
3. Build error for https lib / .NET 4.6.2 with Mono

Expected behavior
Build pass

Log output
If applicable, add log output to help explain your problem.

Code snippets
If applicable, add a code snippet to help explain your problem.

Environment (please complete the following information):

• OS: macOS 10.14
• Development environment: Visual Studio 2019 for Mac, latest
• Runtime: Mono .NET 4.6.2
• OPC Package Release Version 1.4.367.xxx
• Component: Opc.Ua.Bindings.https
• Server: yes

Additional context
May need to use reflection to call these API, as Windows added the properties in .NET Framework even when just compiled for .NET 4..6.2