VS Mac upgrade to 7.2 (build 636) MonoDevelop.CSharp.Project.CSharpProject exception - xamarin

Question

I just did a stable update of VS Mac Community Edition this morning. The current version shown is 7.2 (build 636). I added the entire About Details below. I'm not sure what specific version I upgraded from, but it was the most recent version before this as I stay up to date.
After doing the upgrade, which worked without displaying an error, I get this message when opening an iOS solution:
Error while trying to load the project '/path/to/project.csproj'. The
type initializer for 'MonoDevelop.CSharp.Project.CSharpProject' threw
an exception.
After dismissing that message, I get another error message with a list of this same error message:
The type initializer for
'MonoDevlop.ide.TypeSystem.MonoDevelopWorkspace' threw an exception.
I did a reboot of the machine, and I still see the error. My next step is to do a complete uninstall/reinstall, but before I do, can someone recommend a less time-consuming approach for diagnosing and fixing this error?
About Details
=== Visual Studio Community 2017 for Mac ===
Version 7.2 (build 636) Installation UUID:
56e643f6-0a84-4995-b464-438c06eb25ee Runtime: Mono 5.4.0.201
(2017-06/71277e78f6e) (64-bit) GTK+ 2.24.23 (Raleigh theme)
Package version: 504000201
=== NuGet ===
Version: 4.3.1.4445
=== .NET Core ===
Runtime: /usr/local/share/dotnet/dotnet Runtime Versions:
2.0.0
1.1.1
1.0.4 SDK: /usr/local/share/dotnet/sdk/2.0.0/Sdks SDK Versions:
2.0.0
1.0.3 MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/5.4.0/lib/mono/msbuild/15.0/bin/Sdks
=== Xamarin.Profiler ===
Version: 1.5.6 Location: /Applications/Xamarin
Profiler.app/Contents/MacOS/Xamarin Profiler
=== Xamarin.Android ===
Version: 8.0.0.33 (Visual Studio Community) Android SDK:
/Users/danmiser/Library/Developer/Xamarin/android-sdk-macosx
Supported Android versions:
6.0 (API level 23)
SDK Tools Version: 25.2.5 SDK Platform Tools Version: 26.0.0 SDK Build
Tools Version: 25.0.3
Java SDK: /usr java version "1.8.0_101" Java(TM) SE Runtime
Environment (build 1.8.0_101-b13) Java HotSpot(TM) 64-Bit Server VM
(build 25.101-b13, mixed mode)
Android Designer EPL code available here:
https://github.com/xamarin/AndroidDesigner.EPL
=== Xamarin Inspector ===
Version: 1.3.2 Hash: 461f09a Branch: 1.3-release Build date: Tue, 03
Oct 2017 18:26:57 GMT Client compatibility: 1
=== Apple Developer Tools ===
Xcode 9.0 (13247) Build 9A235
=== Xamarin.iOS ===
Version: 11.2.0.11 (Visual Studio Community) Hash: 2f8bbec0 Branch:
d15-4-xi Build date: 2017-10-05 20:56:05-0400
=== Xamarin.Mac ===
Version: 3.8.0.49 (Visual Studio Community)
=== Build Information ===
Release ID: 702000636 Git revision:
b349c8fc0c2e1aab0179917d56eed75eb3a03337 Build date: 2017-10-06
15:20:04-04 Xamarin addins: a8da992c78f7eb65b3cdb3f951c34a30337cab35
Build lane: monodevelop-lion-d15-4
=== Operating System ===
Mac OS X 10.12.6 Darwin 16.7.0 Darwin Kernel Version 16.7.0
Thu Jun 15 17:36:27 PDT 2017
root:xnu-3789.70.16~2/RELEASE_X86_64 x86_64
=== Enabled user installed addins ===
MFractor 3.00.16

Answer 1

Ensure that you have MFractor extension 'Updated' or Uninstalled. That work for me.
Check:
Visual Studio Community Menu (Top) -> Extensions.... -> Upgrades Tab
Open Extension Editor
Check Upgrades (I remove the extension)