EMGU Face Recognition

Not processing System.TypeInitializationException HResult=-2146233036 Message=“Emgu.CV.CvInvoke”the type of the initializer throw an exception. Source=Emgu.CV TypeName=Emgu.CV.CvInvoke StackTrace: 在 Emgu.CV.CvInvoke.cvLoad(String fileName, IntPtr memstorage, String name, IntPtr realName) 在 Emgu.CV.HaarCascade..ctor(String fileName) ON Face_Recognition.Form1..ctor() Face Recognition\Main Form1.cs:line 34 on Face_Recognition.Program.Main() Face Recognition\Program.cs:line 18 在 System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args) 在 Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() 在 System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) 在 System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) 在 System.Threading.ThreadHelper.ThreadStart() InnerException: System.DllNotFoundException HResult=-2146233052 Message=cannot load DLL“opencv_core242”: Can't find the specified module. (Abnormal from HRESULT:0x8007007E)。 Source=Emgu.CV TypeName="" StackTrace: 在 Emgu.CV.CvInvoke.cvRedirectError(CvErrorCallback errorHandler, IntPtr userdata, IntPtr prevUserdata) 在 Emgu.CV.CvInvoke..cctor() InnerException: I want to know how to it was produced and how to solve it.Could you help me?