ScopedStateTState Class

public sealed class ScopedState<TState> : IDisposable
where TState : struct, new()

Public NotInheritable Class ScopedState(Of TState As {Structure, New})
	Implements IDisposable

generic<typename TState>
where TState : value class, gcnew()
public ref class ScopedState sealed : IDisposable

[<SealedAttribute>]
type ScopedState<'TState when 'TState : struct, new()> =  
    class
        interface IDisposable
    end

bool flag = false;
...
using (ScopedState f(new Ref(flag), true))
{
  // in here, flag will be true
}
// upon leaving, flag will revert to false