Environment data

dotnet --info output:
.NET Command Line Tools (2.0.0)

Product Information:
Version: 2.0.0
Commit SHA-1 hash: cdcd1928c9

Runtime Environment:
OS Name: Mac OS X
OS Version: 10.12
OS Platform: Darwin
RID: osx.10.12-x64
Base Path: /usr/local/share/dotnet/sdk/2.0.0/

Microsoft .NET Core Shared Framework Host

Version : 2.0.0
Build : e8b8861ac7faf042c87a5c2f9f2d04c98b69f28d
VS Code version:
C# Extension version:

Omnisharp is running on mono 5.4 (system wide install)

Steps to reproduce

Just add an F# project under your project root

Expected behavior

Ignore the project and its files.

Related:
#1571