Visual studio 调试后devenv.exe崩溃

我的Visual Studio 2015（带有update3）在调试停止后试图编辑源代码时崩溃。（它也发生在C#WinForm、WPF和Console项目上）
一个月前还可以

我得到了一个System.AccessViolationException崩溃异常。
调试时我发现了一些奇怪的东西：

• 无法在我的程序中获取任何变量，即使是在即时窗口中
• 但我仍然可以获得其他信息（如线程、堆栈…）
• 诊断工具不起作用
• 停止调试后，.vshost.exe仍处于活动状态

我已经修复了Visual Studio，但错误仍然发生

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操作系统：Windows7 x64
System.AccessViolationException未处理 消息：在Microsoft.VisualStudio.LanguageServices.dll中键入“System.AccessViolationException”未处理的异常

在System.AccessViolationException抛出异常：“Microsoft.VisualStudio.LanguageServices.dll” Microsoft.VisualStudio.LanguageServices.dll！Microsoft.VisualStudio.LanguageServices.Implementation.EditAndContinue.VsENCRebuildableProjectImpl.OnReadOnlyDocumentEditTrupt（Microsoft.CodeAnalysis.DocumentId DocumentId、Microsoft.CodeAnalysis.EditAndContinue.SessionReadOnlyReason sessionReason、Microsoft.CodeAnalysis.EditAndContinue.ProjectReadOnlyReason projectReason）未知 Microsoft.VisualStudio.LanguageServices.dll！Microsoft.VisualStudio.LanguageServices.Implementation.EditAndContinue.VsENCRebuildableProjectImpl.OneEdit（Microsoft.CodeAnalysis.DocumentId DocumentId）未知 Microsoft.VisualStudio.LanguageServices.dll！Microsoft.VisualStudio.LanguageServices.Implementation.AbstractVsTextViewFilter.Microsoft.VisualStudio.TextManager.Interop.IVsReadOnlyViewNotification.OnDisableEditingCommand（参考系统.Guid pguidCmdGuid，uint dwCmdId）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.SimpleTextViewWindow.OnDisableEditingCommand（参考系统Guid pguidCmdGuid，uint dwCmdId）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.SimpleTextViewWindow.InnerExec（参考系统Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.Exec（参考系统.Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.Undo.UndoManagerCommandFilter.Microsoft.VisualStudio.OLE.Interop.IOleCommandTarget.Exec（参考System.Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.InnerExec（参考系统Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.Exec（参考系统.Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.VerticalDetail.VerticalContentCommandFilter.Exec（参考系统Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.InnerExec（参考系统Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.Exec（参考系统.Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.Find.FindCommand Filter.Exec（参考系统Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.InnerExec（参考系统Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.Exec（参考系统.Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.IntellisenseCommandFilter.Exec（参考系统Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.InnerExec（参考系统Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.Exec（参考系统.Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.BraceCompletionCommandFilter.Exec（参考系统Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStudio.Editor.Implementation.dll！Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.InnerExec（参考系统Guid pguidCmdGroup、uint nCmdID、uint nCmdexecopt、System.IntPtr pvaIn、System.IntPtr pvaOut）未知 Microsoft.VisualStu