How to pass output of a linq query to another form in C#

Question

I have a Linq query and I want to pass the ouput (userid) to another form for further processing.

 var userid = from auser in allusers.Users where auser.Username == nameString
        select new { id = auser.UserId };

so only 'UserId' is stored in variable 'userid' and I want to use this value in another form. Is there any way we can do this.

Answer 1

If you want to return the result of a query you cannot use anonymous types. You must create a concrete class. In your specific case you could just use an int? like this:

int? userid = (from auser in allusers.Users
               where auser.Username == nameString
               select auser.UserId).SingleOrDefault();