How to add members to a PSObject in C#?
PSMemberInfo is a abstract class, so you cannot make an instance directly, but choose its subclass
in the page : http://msdn.microsoft.com/en-us/library/system.management.automation.pspropertyinfo(v=vs.85).aspx you can find below:
System.Object System.Management.Automation.PSMemberInfo System.Management.Automation.PSPropertyInfo System.Management.Automation.PSAliasProperty System.Management.Automation.PSCodeProperty System.Management.Automation.PSNoteProperty System.Management.Automation.PSProperty System.Management.Automation.PSScriptPropertyChoose your class, and init it.