Remove duplicate entries

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PowerShell

Hi All

I am running a unix command which is giving me the below output which i am storing in a string

,root,appdet,patrol,invscout,trnadm,da003sc,vendabe,sshd,webmd,webm,we002za,tr005ma,r3xadm,qa1adm,r3qadm,kwdadm,best1,ldap,ipsec,maestro,appdet,di003bo,sh506pa,su004sa,nex5ovt,nex46cd,nex8bth,BMCAudit,ve001na,nex3mzn,nex3slw,nex3orp,nex87vj,nex7uxw,nex7geg,nex7lmw,nex3hxf,nex8fas,root,bin,root,bin,sys,bin,adm,nuucp,uucp,,root,root,lp,root,,nobody,lpd,guest,,,root,lp,printq,imnadm,r3dadm,orar3d,d46adm,precise,pr1adm,csadm,su004sa,

$ResultOfMasterListUser = Get-Content "$LocalUserListFileLocation\$LocalUserList"

Now i want to remove the duplicates from the string.

Please tell me how to do this.

Thank you