Created Unassigned: Setting VirtualPixelMethod throws an error [1374]

Setting the VirtualPixelMethod throws an error.

```
Unable to find an entry point named 'MagickImage_VirtualPixelMethod_Set' in DLL 'Magick.NET-Q16-x64.Native.dll'.

at ImageMagick.MagickImage.NativeMethods.X64.MagickImage_VirtualPixelMethod_Set(IntPtr instance, UIntPtr value, IntPtr& exception)
at ImageMagick.MagickImage.NativeMagickImage.set_VirtualPixelMethod(VirtualPixelMethod value)
```

The code was executing well in the previous build. This error seems to be new in 7.0.0.0101.