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Editorial Team
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Asked: 2026-05-26T06:16:53+00:00

I am working with Threads. I am unsure if the flag ThreadStatic Is needed

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I am working with Threads. I am unsure if the flag ThreadStatic Is needed or not. In any thread anyway a can access the simple type of boolean.

When working over several threads what is enought:

Private _ImageToggle As Boolean

or 

 <ThreadStatic()> Private _ImageToggle As Boolean

* MY INTERPRETATION of Marc Gravells answer *

If there are several instances which each are using multithreading, the “Threadstatic” flag can be a solution to use a shared value. As far as I understood rightnow for basic types it does never makes sense.

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1 Answer

  1. Editorial Team

    Since it isn’t static (Shared in VB), [ThreadStatic] has no effect. No; it does not need this.

    When applied to a static field, [ThreadStatic] means that each thread is talking to a different value (essentially it becomes thread-local-storage). This is double-edged, as any async-based (including ASP.NET and WCF) code needs to be really careful. In general I would avoid this flag – it is better to use an instance member and pass that around (between threads) as the context.

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