Does each request in ASP.NET MVC, share static variables with other requests?

Question

Can I store my active Entity framework Database Context for the request, as a static property somewhere, so it's easily fetchable from Validators, helpers etc.

**E.G set it from a global action filter onto a static class as

public static DBContext GlobalHelper.ActiveDbContextForRequest;

Does each request share these static properties though? If they do I suppose it cannot work.

Answer 1

Yes, static variables are shared across the entire application (over all threads). You cannot safely access these variables without synchronization from various requests (since each request is handled on a different thread).

Even if you synchronize access to these variables, there's only a single instance of the static variable so all threads will see the same value - you can't have request-specific values this way.

Answer 2

Static variables are global for the whole application domain by default so the answer is yes, they are shared by all requests served by it.