IsolatedStorageFile.GetUserStoreForApplication throws "Initialization failed." on net6.0-android

[mattleibow]

Description

Call IsolatedStorageFile.GetUserStoreForApplication() and observe an exception:

 android.runtime.JavaProxyThrowable: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
  ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
  ---> System.TypeInitializationException: The type initializer for 'Microsoft.Maui.Controls.UriImageSource' threw an exception.
  ---> System.IO.IsolatedStorage.IsolatedStorageException: Initialization failed.
    at System.IO.IsolatedStorage.Helper.GetDefaultIdentityAndHash(Object& identity, String& hash, Char separator)
    at System.IO.IsolatedStorage.IsolatedStorage.InitStore(IsolatedStorageScope scope, Type domainEvidenceType, Type assemblyEvidenceType)
    at System.IO.IsolatedStorage.IsolatedStorageFile..ctor(IsolatedStorageScope scope)
    at System.IO.IsolatedStorage.IsolatedStorageFile.GetStore(IsolatedStorageScope scope)
    at System.IO.IsolatedStorage.IsolatedStorageFile.GetUserStoreForApplication()

Configuration

This is running with net6.0-android. Works with MonoAndroid and on some other platforms.

Regression?

This works on non-net6.0 Android.

Other information

Original issue: dotnet/android#5705

[ghost]

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Issue Details

---

Description

Call IsolatedStorageFile.GetUserStoreForApplication() and observe an exception:

 android.runtime.JavaProxyThrowable: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
  ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
  ---> System.TypeInitializationException: The type initializer for 'Microsoft.Maui.Controls.UriImageSource' threw an exception.
  ---> System.IO.IsolatedStorage.IsolatedStorageException: Initialization failed.
    at System.IO.IsolatedStorage.Helper.GetDefaultIdentityAndHash(Object& identity, String& hash, Char separator)
    at System.IO.IsolatedStorage.IsolatedStorage.InitStore(IsolatedStorageScope scope, Type domainEvidenceType, Type assemblyEvidenceType)
    at System.IO.IsolatedStorage.IsolatedStorageFile..ctor(IsolatedStorageScope scope)
    at System.IO.IsolatedStorage.IsolatedStorageFile.GetStore(IsolatedStorageScope scope)
    at System.IO.IsolatedStorage.IsolatedStorageFile.GetUserStoreForApplication()

Configuration

This is running with net6.0-android. Works with MonoAndroid and on some other platforms.

Regression?

This works on non-net6.0 Android.

Other information

Original issue: dotnet/android#5705

Author:	mattleibow
Assignees:	-
Labels:	area-System.IO, untriaged
Milestone:	-

[akoeplinger]

The issue here is that in an Android application there's no assembly with a Main() method so Assembly.GetEntryAssembly returns null right now which IsolatedStorage doesn't like:

runtime/src/libraries/System.IO.IsolatedStorage/src/System/IO/IsolatedStorage/Helper.Win32Unix.cs

Lines 45 to 53 in 01b7e73

	// Note that it is possible that there won't be an EntryAssembly, which is something the .NET Framework doesn't
	// have to deal with and shouldn't be likely on .NET Core due to a single AppDomain. Without Evidence
	// to pull from we'd have to dig into the use case to try and find a reasonable solution should we
	// run into this in the wild.
	Assembly? assembly = Assembly.GetEntryAssembly();
	if (assembly == null)
	throw new IsolatedStorageException(SR.IsolatedStorage_Init);

[adamsitnik]

@akoeplinger should we move it to 7.0?

[steveisok]

Unless there's a solution to a null GetEntryAssembly, I think we should consider PNSE for IsolatedStorage