C# Intellisense fails with OmniSharp 1.19

[nightblade9]

Steps to reproduce

• Find a system with the C# plugin v1.18
• Get things working
• Upgrade to the latest plugin version

Expected behavior

• Intellisense still works

Actual behavior

• Intellisense fails

The key: the terminal output indicates a number of errors, one of them being an inability to load a netstandard DLL with version 2.0.0. This is because the latest (1.19) plugin requires .NET 4.7.2 to be installed

Installing 4.7.2 and restarting VSCode resolves the problem.

This seems to be the underlying issue in #2995, #2996, and #2992.

If possible, I think OmniSharp should throw a more explicit error message indicating what the problem is / that an installation of a newer version of the .NET framework is required.

[nightblade9]

I'm closing this since installing .NET 4.7.2 fixed it for me.