revert to 1.19.0 from 1.19.1 cannot find netstandard 2.0

[bruce31]

Issue Type: Bug

Win Server 2012 R2
Attempted upgrade to 1.19.1 - this required install of Framework 4.7.2
Cannot change .Net Framework version on server so needed to revert to 1.19.0

Why is .NET Framework 4.7.2 required? .Net Core 2.1 is installed on this machine. Also this is a user install of VS Code how can a machine-wide change be a requirement?

Starting OmniSharp server at 5/16/2019, 9:33:31 AM
    Target: e:\Devs\bruce317\eval\trunk\Retirement\UnitTestCode\Retirement.Utility.Extensions.UnitTest

OmniSharp server started.
    Path: C:\Users\bruce317\.vscode\extensions\ms-vscode.csharp-1.19.0\.omnisharp\1.32.18\OmniSharp.exe
    PID: 32724

System.IO.FileNotFoundException: Could not load file or assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The system cannot find the file specified.
File name: 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'
   at OmniSharp.Stdio.Driver.Program.<>c__DisplayClass0_1.<Main>b__1()
   at OmniSharp.HostHelpers.Start(Func`1 action) in C:\projects\omnisharp-roslyn\src\OmniSharp.Host\HostHelpers.cs:line 29

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

[ERROR] Error: OmniSharp server load timed out. Use the 'omnisharp.projectLoadTimeout' setting to override the default delay (one minute).

Extension version: 1.19.0
VS Code version: Code 1.33.1 (51b0b28134d51361cf996d2f0a1c698247aeabd8, 2019-04-11T08:27:14.102Z)
OS version: Windows_NT x64 6.3.9600

System Info

Item	Value
CPUs	Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz (64 x 2295)
GPU Status	2d_canvas: disabled_software checker_imaging: disabled_off flash_3d: disabled_software flash_stage3d: disabled_software flash_stage3d_baseline: disabled_software gpu_compositing: disabled_software multiple_raster_threads: disabled_off native_gpu_memory_buffers: disabled_software rasterization: disabled_software surface_synchronization: disabled_off video_decode: disabled_software webgl: disabled_off webgl2: disabled_off
Memory (System)	256.00GB (123.49GB free)
Process Argv	..\DeveloperTools\GlobalTools
Screen Reader	no
VM	0%

[filipw]

1.19.0 requires .NET 4.7.2, however it didn't manifest itself properly with a popup message, only with a silent System.IO.FileNotFoundException: Could not load file or assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51 error.

The last release that used .NET 4.6.1 was 1.18.0

Unfortunately this is by design - MSBuild 16, which is needed in OmniSharp as part of .NET Core 3.0 support, requires .NET 4.7.2 to run therefore OmniSharp was updated to it.

[filipw]

Closing as a duplicate of #2992 - thanks