Description

Create an app using IsolatedStorage. Publish as single file.

try
{
    var store = IsolatedStorageFile.GetUserStoreForApplication();
    var file = store.CreateFile("test.txt");
    Console.WriteLine(file.Name);
}
catch (Exception e)
{
    Console.WriteLine(e);
}

Configuration

.NET 5.0
Single file publish
Tested on win-x64 but should be present everywhere.

Regression?

Yes. Worked in 3.1

Regressed by #40974

Related #42161