Vsphere Client 6.0 Download Link Updated Page
The vSphere Thick Client (C# client) is no longer supported for managing vSphere 6.5 or newer environments. Starting with vCenter 6.5 and ESXi 6.5, VMware fully transitioned to the web-based HTML5 client, and the thick client cannot connect to these newer versions.
.NET 4.5 or later is required for the installation. Installation Steps for vSphere Client 6.0 vsphere client 6.0 download link
Before installing vSphere Client 6.0, ensure your Windows management workstation meets these requirements. The vSphere Thick Client (C# client) is no