Wrapped msbuild for .net core project using paket on linux causes System.TypeLoadException

Description

On Ubuntu while building projects using .net core I get:

error MSB4018: System.TypeLoadException: Could not load type of field 'Microsoft.NET.Build.Tasks.DependencyContextBuilder:_filteredPackages' (12) due to: Could not resolve type with token 01000027 from typeref (expected class 'NuGet.Packaging.Core.PackageIdentity' in assembly 'NuGet.Packaging, Version=5.0.0.6, Culture=neutral, PublicKeyToken=31bf3856ad364e35') assembly:NuGet.Packaging, Version=5.0.0.6, Culture=neutral, PublicKeyToken=31bf3856ad364e35 type:NuGet.Packaging.Core.PackageIdentity member:(null)

see travis build

The environment from travis:

0.01s$ mono --version
Mono JIT compiler version 5.18.1.0 (tarball Fri Mar 15 20:45:47 UTC 2019)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           __thread
	SIGSEGV:       altstack
	Notifications: epoll
	Architecture:  amd64
	Disabled:      none
	Misc:          softdebug 
	Interpreter:   yes
	LLVM:          yes(600)
	Suspend:       preemptive
	GC:            sgen (concurrent by default)
1.20s$ msbuild /version
Copyright (C) Microsoft Corporation. All rights reserved.
16.0.0.0
0.26s$ dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   2.2.202
 Commit:    8a7ff6789d
Runtime Environment:
 OS Name:     ubuntu
 OS Version:  16.04
 OS Platform: Linux
 RID:         ubuntu.16.04-x64
 Base Path:   /usr/share/dotnet/sdk/2.2.202/

@A-Manning also experienced the issue on Ubuntu 18.04.2 x86_64 for .net core 2.2.202

Repro steps

A non minimal reproduction step would be to build the following project elastic-studies at specific commit

Expected behavior

The expected behavior would be that paket builds the project (since that can be done with dotnet cli) on linux

Actual behavior

The wrapped msbuild step in paket fails with TypeLoadException.

Known workarounds

Skip paket and use .net cli directly

[tomilchik]

Baby steps… Following the note above re: Mono.NuGet (4) vs SDK.NuGet (5) I downloaded the NuGet 5 (following these instructions: ([https://docs.microsoft.com/en-us/nuget/install-nuget-client-tools]) , and aliased nuget to point to the newly downloaded version. This fixed msbuild issue: I can now run msbuild MySolution.sln. Build from VS-Community is still failing. Investigating further…

[inosik]

Looks like this issue is going to bubble up more often in the upcoming weeks/months: NuGet/Home#7956.