[mono-cecil] How to make a nested type non-nested?

[Timwi]

I tried this:

    nestedType.DeclaringType.NestedTypes.Remove(nestedType);
    nestedType.DeclaringType = null;
    module.Types.Add(nestedType);
    nestedType.IsPublic = false;

But the result of this during execution is:

Unhandled Exception: System.TypeLoadException: Could not load type
'<type>' from assembly '<assembly>' because the format is invalid.

Any ideas?

Thanks!
Timwi

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mono-cecil