Using int point to do memory copy and get attempted to read protected memory in C++Cli

void CopyMemoryDataToNewArray(int *DataPointer, int DataSize)
{
   array<System::Byte>^ ByteArray = gcnew array<System::Byte>(DataSize);
   pin_ptr<Byte> desPointer = &ByteArray[ByteArray->GetLowerBound(0)];

   //exception is thrown in the line: Attempted to read or write protected memory. 
   memcpy_s(desPointer, sizeof(ByteArray), DataPointer, sizeof(ByteArray));
}

int main(array<System::String ^> ^args)
{
   System::String ^ImgFileName = "SampleImage2.jpg";
   //get the img byte array
   array<System::Byte>^ DataArray = ImageToByteArray(ImgFileName);
   //try to get the pointer of img address
   int* _pointer = (int*)DataArray[0];
   CopyMemoryDataToNewArray(_pointer, DataArray::Length);
}