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POAre static class instances unique to a request or a server in ASP.NET?
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copied!<p>On an ASP.NET website, are static classes unique to each web request, or are they instantiated whenever needed and GCed whenever the GC decides to disposed of them?</p> <p>The reason I ask is because I've written some static classes before in C# and the behavior is different than I would have expected. I would have expected static classes to be unique to each request, but it doesn't seem like that is the case.</p> <p>If they are not unique to each request, is there a way to allow them to be?</p> <p><strong>UPDATE:</strong><br> The answer driis gave me was exactly what I needed. I was already using a singleton class, however it was using a static instance and therefore was being shared between requests even if the users were different which in this case was a bad thing. Using <code>HttpContext.Current.Items</code> solves my problem perfectly. For anyone who stumbles upon this question in the future, here is my implementation, simplified and shortened so that it easy to understand the pattern:</p> <pre><code>using System.Collections; using System.Web; public class GloballyAccessibleClass { private GloballyAccessibleClass() { } public static GloballyAccessibleClass Instance { get { IDictionary items = HttpContext.Current.Items; if(!items.Contains("TheInstance")) { items["TheInstance"] = new GloballyAccessibleClass(); } return items["TheInstance"] as GloballyAccessibleClass; } } } </code></pre>

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