details about the cause of the failure

- `clr.AddReference` no longer adds ".dll" implicitly

- `PyIter(PyObject)` constructor replaced with static `PyIter.GetIter(PyObject)` method

- Python runtime can no longer be shut down if the Python error indicator is set, as it would have unpredictable behavior

- BREAKING: Return values from .NET methods that return an interface are now automatically

wrapped in that interface. This is a breaking change for users that rely on being

able to access members that are part of the implementation class, but not the

{

return;

}

if (Exceptions.ErrorOccurred())

{

throw new InvalidOperationException(

"Python error indicator is set",

innerException: PythonException.PeekCurrentOrNull(out _));

}

// If the shutdown handlers trigger a domain unload,

// don't call shutdown again.

AppDomain.CurrentDomain.DomainUnload -= OnDomainUnload;

=> FetchCurrentOrNullRaw()

?? throw new InvalidOperationException("No exception is set");

internal static Exception? PeekCurrentOrNull(out ExceptionDispatchInfo? dispatchInfo)

{

using var _ = new Py.GILState();

Runtime.PyErr_Fetch(out var type, out var value, out var traceback);

Runtime.PyErr_Restore(

new NewReference(type, canBeNull: true).StealNullable(),

new NewReference(value, canBeNull: true).StealNullable(),

new NewReference(traceback, canBeNull: true).StealNullable());

var err = FetchCurrentOrNull(out dispatchInfo);

Runtime.PyErr_Restore(type.StealNullable(), value.StealNullable(), traceback.StealNullable());

return err;

}

internal static Exception? FetchCurrentOrNull(out ExceptionDispatchInfo? dispatchInfo)

{

dispatchInfo = null;