Is it safe to store an ObjectContext in a static thread variable in ASP.NET?

Question

I read what I should store ObjectContextin HttpContext.Currentto split mine ObjectContextinto different services / repositories called in the request. I am wondering if it can be used ObjectContextwith an attribute [ThreadStatic]in a class variable static. Is this a safe thing? Each request is processed in its own thread?

Answer 1

No, there can be several requests in one thread, and, more importantly, one request can be processed by several threads. This is called thread flexibility , and you run into problems when storing stuff in stream-static variables instead of context: when ASP.NET moves from one stream to another during the same request, the HttpContext is still available, but the static stream variable is not .

Some links with additional information:

• CallContext vs ThreadStatic (related question)
• http://piers7.blogspot.com/2005/11/threadstatic-callcontext-and_02.html (blog post with details)

Answer 2

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