LINQ Equivalent To A T-SQL IN

SELECT * FROM MemberInfomation WHERE @samAccount IN ('adf','asfd','wqewe')

Similarly you can do a IN like filter in LINQ:

 public List GetInformation(String[] samAccounts)
        {
            SomeDataContextdc = new SomeDataContext();
            return dc.MemberInfomation.Where(
                              o => samAccounts.Contains(o.samaccount)
                                         ).ToList(); 
        }

Got help from here.