Xamarin iOS Simulator tests throw System.Reflection.TargetException

[AddressXception]

Bug Report

Current Behavior
When running the C# tests in the ios simulator test harness sometimes the tests will fail to execute properly due to a reflection error. This is likely caused by a misalignment of pointer references when the garbage collector runs. This bug was introduced as part of #152 and #154 when the safe handle was added. It is likely that the safe handle is either freeing resources it should not free or is not freeing resources that it should.

Expected Behavior
The tests should be able to be run multiple times in any order with consistent results.

1. fire up the simulator and run the tests
2. poke around running tests individually for a while
3. expected: all tests pass always
4. actual: eventually you'll hi the stack trace below

Environment

• OS: OSX, IPhone Simulator
• Version: Big Sur on x64

Possible Solution

Additional context/Screenshots
Trace:

TestBallot
2021-02-19 10:53:56.417720-0500 ElectionGuard.Tests.iOS[18485:1575001] 	[FAIL] TestBallot.Test_Ballot_Property_Getters : System.Reflection.TargetException : Object does not match target type.
2021-02-19 10:53:56.417887-0500 ElectionGuard.Tests.iOS[18485:1575001] 		  at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00024] in /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/src/Xamarin.iOS/mcs/class/corlib/System.Reflection/RuntimeMethodInfo.cs:376
2021-02-19 10:53:56.418028-0500 ElectionGuard.Tests.iOS[18485:1575001] 		  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/Current/src/Xamarin.iOS/external/corefx/src/Common/src/CoreLib/System/Reflection/MethodBase.cs:53
2021-02-19 10:53:56.418156-0500 ElectionGuard.Tests.iOS[18485:1575001] 		  at NUnit.Framework.Internal.Reflect.InvokeMethod (System.Reflection.MethodInfo method, System.Object fixture, System.Object[] args) [0x00009] in /Users/builder/jenkins/workspace/xamarin-macios/xamarin-macios/builds/downloads/ios-release-Darwin-5e9cb6d1c1de430965312927d5aed7fcb27bfa73/ios-sources/external/nunit-lite/NUnitLite-1.0.0/src/framework/Internal/Reflect.cs:215
2021-02-19 10:53:56.418557-0500 ElectionGuard.Tests.iOS[18485:1575001] 	[FAIL] TestBallot.Test_Plaintext_Ballot_Selection_Is_InValid_With_Different_objectIds : System.Reflection.TargetException : Object does not match target type.

[XinyiXiang]

Please assign this to me

[keithrfung]

@XinyiXiang This issue is no longer relevant. See #195