title: Could not load file or assembly 'Microsoft.Windows.Design.Interaction, Version=4.3.0.0, PublicKeyToken=b03f5f7f11d50a3a'
body: <p>I just installed the Visual studio 2015 update 1 and I can no longer use the designer view of WPF. It says an unhandled exception has occurred. Here's the stack trace. :</p>
  
  <pre><code>System.IO.FileLoadException
  Could not load file or assembly 'Microsoft.Windows.Design.Interaction, Version=4.3.0.0, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
     at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark&amp; stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
     at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark&amp; stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
     at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, RuntimeAssembly reqAssembly, StackCrawlMark&amp; stackMark, IntPtr pPrivHostBinder, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)
     at System.Reflection.Assembly.Load(AssemblyName assemblyRef)
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.AppDomainFactory.AddBindingRedirectForAssembly(String assemblyName, String publicKeyToken, String oldVersion, String newVersion)
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.AppDomainFactory.ConfigureMandatoryAssemblies()
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.AppDomainFactory.ConfigureAppDomain()
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.AppDomainFactory.CreateAppDomainInfo()
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.ProcessDomainFactory.CreateIsolationDomain(IIsolationBoundary boundary)
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.IsolationBoundary.Initialize()
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.Primitives.IsolationBoundary.CreateInstance[T](Type type)
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.IsolatedObjectFactory.Initialize()
     at Microsoft.VisualStudio.DesignTools.DesignerHost.Services.VSIsolationService.CreateObjectFactory(IIsolationTarget isolationTarget, IObjectCatalog catalog)
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.IsolationService.CreateLease(IIsolationTarget isolationTarget)
     at Microsoft.VisualStudio.DesignTools.DesignerContract.IsolatedDesignerService.CreateLease(IIsolationTarget isolationTarget, CancellationToken cancelToken, DesignerServiceEntry&amp; entry, IServiceProvider serviceOverrides)
     at Microsoft.VisualStudio.DesignTools.DesignerContract.IsolatedDesignerService.IsolatedDesignerView.CreateDesignerViewInfo(CancellationToken cancelToken)
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.IsolatedTaskScheduler.InvokeWithCulture[T](CultureInfo culture, Func`2 func, CancellationToken cancelToken)
     at Microsoft.VisualStudio.DesignTools.DesignerContract.Isolation.IsolatedTaskScheduler.&lt;&gt;c__DisplayClass10_0`1.&lt;StartTask&gt;b__0()
     at System.Threading.Tasks.Task`1.InnerInvoke()
     at System.Threading.Tasks.Task.Execute()
  </code></pre>
  
  <p>It used to work just fine before updating VS2015.
  How can I fix this?</p>