In the case a source needs to be ApiUpdated and it set C# alieases for the same name multiple times an exceptions is thrown in ScriptUpdater.

As a workaround user can use different alias names.

For instance (assuming there's a class named Bar in namespace Foo):

namespace NIQ
{
using F = Foo.Bar;

class C : F { }
}

namespace Other
{
using F = System.Console; // Crash here
}