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POSystem.ArgumentNullException in ResourceManager.GetString internals
 

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  1. POSystem.ArgumentNullException in ResourceManager.GetString internals
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    <p>My code:</p> <pre><code>System.Resources.ResourceManager resourceManager = GetResourceManager(); string str = resourceManager.GetString("delete", new CultureInfo(1033)); </code></pre> <p>In current project compiled under .NET 2.0 everything works as excepted. Variable <em>str</em> contains resource string for LCID 1033 - <strong>Delete</strong>, this is ok.</p> <p>We are now upgrading to .NET 4.0, recompiled project under target framework .NET 4.0. Now compiled as .NET 4.0 assemblies, it throws exception <strong>System.ArgumentNullException</strong> with message <strong>Value cannot be null.</strong>.Stack trace:</p> <pre><code> at System.Threading.Monitor.Enter(Object obj) at System.Resources.ResourceManager.InternalGetResourceSet(CultureInfo requestedCulture, Boolean createIfNotExists, Boolean tryParents, StackCrawlMark&amp; stackMark) at System.Resources.ResourceManager.InternalGetResourceSet(CultureInfo culture, Boolean createIfNotExists, Boolean tryParents) at System.Resources.ResourceManager.GetString(String name, CultureInfo culture) </code></pre> <p>Interesting here is stacktrace, where it points to internal framework method in <strong>ResourceManager.InternalGetResourceSet</strong> which causes to call <strong>Monitor.Enter</strong> with null object. But i call method <em>GetString</em> with not null parameters <em>GetString("delete", new CultureInfo(1033))</em>.</p> <p>This bug seems to be similar to <a href="https://stackoverflow.com/questions/1655182/system-argumentnullexception-in-system-threading-monitor-enter">System.ArgumentNullException in System.Threading.Monitor.Enter</a>. Maybe some bug in Monitor.Enter, or something else?</p> <p>Update: When i look in debugger at object <code>resourceManager.ResourceSets.Items[2].Value.Table["delete"]</code> then it contains string value "Delete". property Items[2] here pointing to LCID 1033. This means that resource manager already contains localized string for resource key <em>delete</em> in language <em>1033</em>. Does anybody knows where can be error?</p>
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    1. COVery interesting. I tried to explore the ResourceManager class in Reflector but I have only mscorlib 2.0. If it is a bug, I would search for it in ResourceManager.InternalGetResourceSet method. Are you using .NET or Mono? I would like to be of help
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      1. USusr-local-ΕΨΗΕΛΩΝ
    2. COI am using .NET on windows, FW 4.0, just decompiled with Reflector, but could not find any unusual stuff in internal method. Take a look at this decompiled method here - http://paste.org/pastebin/view/25636.
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    3. CONow i use .NET Reflector addin within Visual Studio to debug mscorlib, and find out that it falls in line 14 - lock (localResourceSets) (on pasted sample)
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