displaying a null value when concatenating value.

I am running the select query below.  the problem is that when I join     tblContact.strLName + ',' + tblContact.strFName + '-' + tblContact.strTitle AS name I get a null value is either strlname, strfname or strtitle is Null.  How can I write it so that if one of the values isnull it still writes out the name.   Thank you

SELECT DISTINCT
                      tblContact.lngContactId, tblContact.strLName, tblContact.strFName, tblContact.strTitle,
                      tblContact.strLName + ',' + tblContact.strFName + '-' + tblContact.strTitle AS name
FROM         tblContactType INNER JOIN
                      tblContact INNER JOIN
                      tblContactClass ON tblContact.lngContactId = tblContactClass.lngContactId ON tblContactType.lngContactType = tblContactClass.lngContactType
WHERE     (tblContact.strLName IS NOT NULL)
ORDER BY tblContact.strLName DESC, tblContact.lngContactIdStart Free Trial