Quick C# method to validate a Citrix XenServer login
        
        Below is a quick C# method for validating a XenServer API login, give the server name/IP address, username and 
password using the XenServer .Net SDK.
If you need the XenServer .NET SDK you can get it from the nuget.org package system 
within visual studio by searching for XenServer or by clicking on the direct link
400: Invalid request