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POVisual Studio Watch window not taking into account usings
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copied!<p>I have the following code in a view model:</p> <pre><code>public Point Location { get { var rangePixels = Range * PixelsPerMile; var xCoordinate = OwnLocation.X * MapScale + rangePixels * Math.Cos(Theta); var yCoordinate = OwnLocation.Y * MapScale - rangePixels * Math.Sin(Theta); return new Point(xCoordinate, yCoordinate); } } </code></pre> <p>One of the usings at the top of the code file is <code>System</code>, which contains <code>Math</code>.</p> <p>If I view <code>Math.Sin(Theta)</code> in the Watch window (by selecting the code, right clicking, and choosing "Add Watch"), I get the following error:</p> <blockquote> <p>The name 'Math' does not exist in the current context </p> </blockquote> <p>What I want to know is:</p> <ol> <li>Is this expected/default behavior for Visual Studio 2010? I could swear this never used to be a problem, but maybe it's always worked that way and I somehow never noticed.</li> <li>If it's not normal to get this error, any thoughts on what the problem could be? There are a million settings in Visual Studio, and I wouldn't know where to begin.</li> </ol> <p>I should note this question is vaguely similar to <a href="https://stackoverflow.com/questions/8672620/out-of-context-variables-in-visual-studio-2010-debugger">this</a>, but I'm not having any issues mousing over my local variables, and I'm not using PostSharp.</p> <p><strong>Edit</strong></p> <p>I just tried resetting all my Visual Studio settings backs to default, and I'm still getting the same error. If someone wants to try a simple test in Visual Studio, I just want to know if you get an error if you add a watch for <code>Math.Sin(1)</code>.</p> <p><strong>Edit 2</strong></p> <p>Here are a couple screen captures to show what I'm experiencing:</p> <p><img src="https://i.stack.imgur.com/DaDRk.png" alt="Adding Math.Sin(1) to watch"></p> <p><img src="https://i.stack.imgur.com/ta6yQ.png" alt="Showing error for Watch"></p> <p><strong>Edit 3</strong></p> <p>Interestingly, intellisense works if I type <code>Math.</code> into the Watch window, but if I complete the expression, I still get the error:</p> <p><img src="https://i.stack.imgur.com/7OkDT.png" alt="Showing intellisense working"></p> <p><strong>Edit 4</strong></p> <p>To address BACON's questions:</p> <ol> <li>I get the same behavior with QuickWatch and Immediate.</li> <li>Closing and reopening all the windows does not solve the problem.</li> <li>I'm using Visual Studio 2010 Professional (version 10.0.40219.1 SP1Rel)</li> <li>I tried targeting .NET 4.0 Client Profile and full .NET 4.0. Made no difference. I created a Console App (rather than a WPF app) targeting .NET 4.0 Client Profile, and finally, the error did not occur. So, WPF may be an issue (or WPF with some third-party libraries). (Will check on that next.)</li> </ol>

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