NVM, forgot about VMware Remote Console (VMRC), which is the optimized way of connection to VM GUI console, download it now.
I think vsphere C# client currently is VMRC in some minimal way. At least one is still actively developed. (You cant connect to an .iso file using webclient flex without uploading the whole .iso file to the host, however with the older C# client and newer method VMRC this can be still done).
That said, we lost the export to .ova or .ovf easier method compared to web ui export which gives you the .vmdk file as is.