samAccount in Ldap query for asp.net c#

Question

Hi How can search two or more user throgh Ldap query in same time like below query??

 

(|(|(|( samAccountname=abc){0}(samAccountname=xyz){0})(department=AB){0}(|(objectclass=user)(objectclass=contact)(objectcategory=group))))

 

Actualy i want to search for multiple user using for loop in one query 

 

i am using this query in C# to get users from Active Direcrty  

 

 

please help

 

Thanks