删除数据集后编译问题

Question

我删除了一个数据集，现在我遇到了各种各样的错误。这个真的让我感到沮丧。它出现为'反汇编'，我不知道那是什么，这就是消息：

System.ArgumentNullException was unhandled
  Message=Value cannot be null.
Parameter name: activationContext
  Source=mscorlib
  ParamName=activationContext
  StackTrace:
       at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)
       at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext)
       at System.Activator.CreateInstance(ActivationContext activationContext)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

任何帮助都会很棒。感谢。