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copied!<p>As neither the tests or the web application is working, it's likely that the problem you are seeing is because the configuration is not being loaded. I suspect that the following...</p> <pre><code>ConfigurationManager.ConnectionStrings["DomainDatabase"] </code></pre> <p>...returns null. The <em>NullReferenceException</em> is thrown when you attempt to access the <em>ConnectionString</em> property on that null object (reference). I would verify that your configuration for connectionStrings matches the definition defined <a href="http://msdn.microsoft.com/en-us/library/system.configuration.configurationmanager.connectionstrings.aspx" rel="nofollow noreferrer">here</a>: </p> <p>You can verify that your settings aren't being loaded with the following test:</p> <pre><code>[TestMethod] public void VerifyThatMyDatabaseConnectionStringExists() { Assert.IsNotNull(ConfigurationManager.ConnectionStrings["DomainDatabase"]); } </code></pre> <p>If this test fails, add an app.config to your test project with the proper configuration. You will know that you have solved this problem when ...<a href="http://www.google.ca/search?q=when%20you%20can%20take%20this%20pebble%20from%20my%20hand" rel="nofollow noreferrer">you can take this pebble from my hand</a> -- no wait, wrong reference -- this test passes.</p> <p>Tip: <a href="https://stackoverflow.com/questions/344069/can-a-unit-test-project-load-the-target-applications-app-config-file/344233#344233">This answer</a> suggests you should write tests to verify that your settings are present to prevent madness.</p>

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