Unable to load DLL 'DlibDotNetNativeXXX': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

Please check the following points

Common

• There are DlibDotNetNative and DlibDotNetNativeDnn in application directory
  • In the case of installing from nuget and using .NET Core application, these libraries are in nuget cache directory.
• Install dependency library
  • Check Requirements

CUDA

• Install proper NVIDIA CUDA Toolkit corresponds to DlibDotNet nuget package
• Install cuDNN library to CUDA directory

MKL

• For Windows, deploy the libraries to application directory (Should be better for copy all library)
  • libiomp5md.dll
  • mkl_core.dll
  • mkl_def.dll
  • mkl_intel_thread.dll