c# - Validating a simple login using LINQ -

i have datasource using linq need validate simple user, password against.

//load textfields local variables         string user = username.text.tolower().trim();         string pass = userpass.text.tolower().trim();          //check credentials         var xrm = new xrmservicecontext("xrm");         var inspectors = in xrm.systemuserset                          i.new_mobileappuser.equals(user.tostring())                          select new { inspectorpass = i.new_mobileapppassword                           };          if (user == null || pass == null)         {             lblmsg.text = "you must enter valid username , password";          }          if (inspectors == pass)             {                 // (correct password)                 formsauthentication.redirectfromloginpage(username.text, chkpersistcookie.checked);                 response.redirect("/default.aspx");              }             else             {                 // else (incorrect password)             lblmsg.text = "sorry, invalid credentials. please try again.";              } 

is there i'm missing here? i've followed other peoples examples , should able if inspectors == pass redirect. it's complaining cannot?

error message:-

error error 23 operator '==' cannot applied operands of type 'system.linq.iqueryable' , 'string' logon.aspx.cs

try this:

try {     var inspector = inspectors.singleordefault();     if(inspector != null && inspector.inspectorpass == pass)     {} } catch(){}