>I don't know anything about your QueryRequest or QueryHelper classes, but if QueryRequest doesn't let you change the query, you may have problems with that class. I also don't understand why QueryHelper needs both an IQueryable and QueryRequest.
>
>As for a generic class with a subset of data, that probably isn't going to work. The closest you are going to get with C# is either anonymous types, dynamic types, or datatables, and I don't think you are going to be able to pass in the necessary code to create those in as a list of strings or a dictionary. You could maybe pass in a Func that creates the objects, but you would be adding a lot of complexity to your code for probably very little gain.

I'll look closer into the QueryRequest class. May be you're right and I will be able to add that select into that class as you suggested.

Thanks again.

I looked into the QueryRequest class and it only has Filter and some extra properties, e.g.

public class QueryRequest
    {
        public string OrderBy { get; set; }
        public string Dir { get; set; }
        public int Page { get; set; }
        public int PageSize { get; set; }
        public Filter FilterInfo { get; set; }

        public QueryRequest()
        {
            Page = 1;
            PageSize = 15;
            FilterInfo = new Filter();
        }
    }

So I would not be able to add select to that class instance.