How to concatenate 2 values in IdentifierClaim

  Hi,

     I need to display user from SAML token with F.ex two values as "user1_test" in Sharepoint where "user1" is as AccountName and  "test" is name of Department. Is it possible to concatenate these two values together and use as:

" -IdentifierClaim $claim1+$claim2.InputClaimType in syntax as below:

New-SPTrustedIdentityTokenIssuer -Name "MyDomainADFS2" -Description "ADFS 2 Federated Server for MyDomain" -Realm $realm -ImportTrustCertificate $cert -ClaimsMappings $claim1,$claim2 -SignInUrl $signinurlIdentifierClaim $claim1+$claim2.InputClaimType

Thanx for any help.