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                                  • Unhandled exception:
                                    System.ArgumentException
                                    An item with the same key has already been added.
                                       at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
                                       at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
                                       at System.Reflection.Metadata.Ecma335.NamespaceCache.PopulateNamespaceTable()
                                       at System.Reflection.Metadata.Ecma335.NamespaceCache.GetNamespaceData(NamespaceDefinitionHandle handle)
                                       at System.Reflection.Metadata.MetadataReader.GetNamespaceDefinition(NamespaceDefinitionHandle handle)
                                       at DevExpress.CodeRush.ContinuousTesting.Core.MethodInfoSearcher.GetMethodInfo(AssemblyItem assemblyItem, MethodDefinitionHandle handle, Pdb pdb)
                                       at DevExpress.CodeRush.ContinuousTesting.Core.MethodInfoSearcher.DiscoverMethods(String path, CancellationToken token)
                                       at DevExpress.CodeRush.ContinuousTesting.Core.ContinuousTestingService.DiscoverMethodsInProject(String name, String path, Boolean force)
                                       at DevExpress.CodeRush.ContinuousTesting.Core.ContinuousTestingService.<>c__DisplayClass41_0.<DiscoverMethods>b__0()
                                       at System.Threading.Tasks.Task.InnerInvoke()
                                       at System.Threading.Tasks.Task.Execute()
                                    --- End of stack trace from previous location where exception was thrown ---
                                       at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
                                       at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
                                       at DevExpress.CodeRush.ContinuousTesting.Core.ContinuousTestingService.<DiscoverMethods>d__41.MoveNext()
                                    --- End of stack trace from previous location where exception was thrown ---
                                       at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
                                       at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
                                       at DevExpress.CodeRush.VSContinuousTesting.WorkspaceMonitor.<ehWorkspaceChanged>d__12.MoveNext()
                                    --- End of stack trace from previous location where exception was thrown ---
                                       at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c__DisplayClass2.<ThrowAsync>b__3(Object state)
                                       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
                                       at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
                                       at System.Windows.Threading.DispatcherOperation.InvokeImpl()
                                       at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
                                       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
                                       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
                                       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
                                       at System.Windows.Threading.DispatcherOperation.Invoke()
                                       at System.Windows.Threading.Dispatcher.ProcessQueue()
                                       at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
                                       at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
                                       at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
                                       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
                                       at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
                                       at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
                                       at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)

                                • Alex B.G. (DevExpress) 06.23.2015

                                  Hi Dominik,

                                  Thank you for your report and interest in our product. We already received reports about the same issue, and our developers introduced some changes to prevent this crash.
                                  Would you please download and install the following build?
                                  http://downloads.devexpress.com/Share/IDE/150610/DevExpress.CodeRush.Roslyn-1.0.3.0.zip

                                  To reinstall a new build of CodeRush for Rolsyn, follow these steps:

                                  1. Close all Visual Studio instances.
                                  2. Completely remove the CodeRush for Roslyn extension folder. It should be something like "C:\Users\<username>\AppData\Local\Microsoft\VisualStudio\14.0\Extensions\1djw15vb.h30" on your machine.
                                  3. Download the zip file, which contains the CodeRush vsix extension container.
                                  4. Extract the vsix container from this zip archive.
                                  5. Install the CodeRush extension from the vsix container. Double-click the .vsix file. Setup should start automatically.
                                  6. Start Visual Studio 2015 to ensure that CodeRush for Roslyn was successfully installed.

                                  Let us know how it works on your side.

                                1 Solution

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                                Fixed:

                                We have fixed this problem and will include it in an upcoming release. The final release date has not been set, but once it is published we will send you an automatic notification.